THC Science

2018 United States state legislative elections
87 legislative chambers; 46 states
	Map of upper house elections:; Democrats gained control; Democrats retained control; Republicans retained control; Non-partisan legislature; No regularly-scheduled elections
	Map of lower house elections:; Democrats gained control; Democrats retained control; Republicans retained control; Coalition retained control; Non-partisan legislature; No regularly-scheduled elections

The 2018 United States state legislative elections were held on November 6, 2018, for 87 state legislative chambers in 46 states. Across the fifty states, approximately 56 percent of all upper house seats and 92 percent of all lower house seats were up for election. Additionally, six territorial chambers in four territories and the District of Columbia were up as well.

Democrats flipped at least 350 state legislative seats,^[2] picking up most of those seats in states where President Trump's approval rating was relatively low.^[3] Six chambers—the Colorado Senate, New Hampshire House, New Hampshire Senate, Minnesota House, Maine Senate and New York State Senate—flipped from Republican to Democratic control.^[4] Additionally the Connecticut Senate went from being evenly divided to a Democratic majority.^[4] Democrats also broke Republican legislative supermajorities in North Carolina,^[5] Michigan and Pennsylvania^[3] and gained a legislative supermajority in both houses of the California, Illinois and Oregon legislatures.^[6]^[7]

Summary table[edit]

Regularly-scheduled elections were held in 87 of the 99 state legislative chambers in the United States; nationwide, regularly-scheduled elections were held for 6,064 of the 7,383 legislative seats. Most legislative chambers held elections for all seats, but some legislative chambers that use staggered elections held elections for only a portion of the total seats in the chamber.^[8] The chambers that were not up for election either hold regularly-scheduled elections in odd-numbered years, or have four-year terms and hold all regularly-scheduled elections in presidential election years.

Note that this table only covers regularly-scheduled elections; additional special elections took place concurrently with these regularly-scheduled elections.

State	Upper House^[8]				Lower House^[8]
State	Seats up	Total	% up	Term	Seats up	Total	% up	Term
Alabama	35	35	100	4	105	105	100	4
Alaska	10	20	50	4	40	40	100	2
Arizona	30	30	100	2	60	60	100	2
Arkansas	18	35	51	2/4^[d]	100	100	100	2
California	20	40	50	4	80	80	100	2
Colorado	17	35	49	4	65	65	100	2
Connecticut	36	36	100	2	151	151	100	2
Delaware	10	21	48	2/4^[d]	41	41	100	2
Florida	20	40	50	2/4^[d]	120	120	100	2
Georgia	56	56	100	2	180	180	100	2
Hawaii	12	25	48	2/4^[d]	51	51	100	2
Idaho	35	35	100	2	70	70	100	2
Illinois	39	59	66	2/4^[d]	118	118	100	2
Indiana	25	50	50	4	100	100	100	2
Iowa	25	50	50	4	100	100	100	2
Kansas	0	40	0	4	125	125	100	2
Kentucky	19	38	50	4	100	100	100	2
Louisiana	0	39	0	4	0	105	0	4
Maine	35	35	100	2	151	151	100	2
Maryland	47	47	100	4	141	141	100	4
Massachusetts	40	40	100	2	160	160	100	2
Michigan	38	38	100	4	110	110	100	2
Minnesota	0	67	0	2/4^[d]	134	134	100	2
Mississippi	0	52	0	4	0	122	0	4
Missouri	17	34	50	4	163	163	100	2
Montana	25	50	50	4	100	100	100	2
Nebraska	24^[e]	49^[e]	49^[e]	4	N/A (unicameral)
Nevada	11	21	52	4	42	42	100	2
New Hampshire	24	24	100	2	400	400	100	2
New Jersey	0	40	0	2/4^[d]	0	80	0	2
New Mexico	0	42	100	4	70	70	100	2
New York	63	63	100	2	150	150	100	2
North Carolina	50	50	100	2	120	120	100	2
North Dakota	24	47	51	4	47	94	50	4
Ohio	16	33	52	4	99	99	100	2
Oklahoma	24	48	50	4	101	101	100	2
Oregon	15	30	50	4	60	60	100	2
Pennsylvania	25	50	50	4	203	203	100	2
Rhode Island	38	38	100	2	75	75	100	2
South Carolina	0	46	0	4	124	124	100	2
South Dakota	35	35	100	2	70	70	100	2
Tennessee	17	33	52	4	99	99	100	2
Texas	15	31	48	2/4^[d]	150	150	100	2
Utah	14	29	48	4	75	75	100	2
Vermont	30	30	100	2	150	150	100	2
Virginia	0	40	0	4	0	100	0	2
Washington	25	49	49	4	98	98	100	2
West Virginia	17	34	50	4	100	100	100	2
Wisconsin	17	33	52	4	99	99	100	2
Wyoming	15	30	50	4	60	60	100	2
Total	1106	1972	56	N/A	4958	5411	92	N/A

State summaries[edit]

Alabama[edit]

All members of the Alabama Senate and the Alabama House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Alabama Senate
Party		Before	After
	Republican	27	27
	Democratic	8	8
Total		34	34

Alabama House of Representatives
Party		Before	After	Change
	Republican	72	77	5
	Democratic	33	28	5
Total		105	105

Alaska[edit]

Half of the seats of the Alaska Senate and all of the seats of the Alaska House of Representatives were up for election in 2018. Republicans retained control of the Senate, while a cross-partisan coalition of Democrats, Republicans, and independents retained control of the House of Representatives.^[9]

Alaska Senate
Party		Before	After	Change
	Republican	14	13	1
	Democratic	6	7	1
Total		20	20

Alaska House of Representatives
Party		Before	After	Change
	Democratic	17^[f]	15^[g]	2
	Independent	2	2
	Republican	3	8	2
	Republican	18	15	2
Total		40	40

Arizona[edit]

All of the seats of the Arizona Senate and the Arizona House of Representatives were up for election in 2018. Republicans retained control of both chambers, but lost four seats in the House and lost the popular vote in the Senate by 1.4 points.

Arizona Senate
Party		Before	After
	Republican	17	17
	Democratic	13	13
Total		30	30

Arizona House of Representatives
Party		Before	After	Change
	Republican	35	31	4
	Democratic	25	29	4
Total		60	60

Arkansas[edit]

Half of the seats of the Arkansas Senate and all of the seats of the Arkansas House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Arkansas Senate
Party		Before	After	Change
	Republican	28	29	1
	Democratic	7	6	1
Total		35	35

Arkansas House of Representatives
Party		Before	After	Change
	Republican	77	82	5
	Democratic	23	18	5
Total		100	100

California[edit]

Half of the seats of the California State Senate and all of the seats of the California State Assembly were up for election in 2018. Democrats retained control of both chambers.

California State Senate
Party		Before	After	Change
	Democratic	26	29	3
	Republican	14	11	3
Total		40	40

California State Assembly
Party		Before	After	Change
	Democratic	55	60	5
	Republican	25	20	5
Total		80	80

Colorado[edit]

Half of the seats of the Colorado Senate and all of the seats of the Colorado House of Representatives were up for election in 2018. Democrats won control of the Senate and retained control of the House of Representatives.

Colorado Senate
Party		Before	After	Change
	Democratic	17	19	2
	Republican	18	16	2
Total		35	35

Colorado House of Representatives
Party		Before	After	Change
	Democratic	37	42	5
	Republican	28	23	5
Total		65	65

Connecticut[edit]

All of the seats of the Connecticut State Senate and the Connecticut House of Representatives were up for election in 2018. Democrats won control of the Senate, which was previously tied and retained control of the House of Representatives.

Connecticut State Senate
Party		Before	After	Change
	Democratic	18	23	5
	Republican	18	13	5
Total		36	36

Connecticut House of Representatives
Party		Before	After	Change
	Democratic	80	92	12
	Republican	71	59	12
Total		151	151

Delaware[edit]

Half of the seats of the Delaware Senate and all of the seats of the Delaware House of Representatives were up for election in 2018. Democrats retained control of both chambers.

Delaware Senate
Party		Before	After	Change
	Democratic	11	12	1
	Republican	10	9	1
Total		21	21

Delaware House of Representatives
Party		Before	After	Change
	Democratic	25	26	1
	Republican	16	15	1
Total		41	41

Florida[edit]

Half of the seats of the Florida Senate and all of the seats of the Florida House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Florida Senate
Party		Before	After	Change
	Republican	24	23	1
	Democratic	16	17	1
Total		40	40

Florida House of Representatives
Party		Before	After	Change
	Republican	78	73	5
	Democratic	42	47	5
Total		120	120

Georgia[edit]

All of the seats of the Georgia State Senate and the Georgia House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Georgia State Senate
Party		Before	After	Change
	Republican	37	35	2
	Democratic	19	17	2
Total		56	56

Georgia House of Representatives
Party		Before	After	Change
	Republican	116	105	11
	Democratic	64	75	11
Total		180	180

Hawaii[edit]

Half of the seats of the Hawaii Senate and all of the seats of the Hawaii House of Representatives were up for election in 2018. Democrats retained control of both chambers.

Hawaii Senate
Party		Before	After	Change
	Democratic	25	24	1
	Republican	0	1	1
Total		25	25

Hawaii House of Representatives
Party		Before	After
	Democratic	46	46
	Republican	5	5
Total		51	51

Idaho[edit]

All of the seats of the Idaho Senate and the Idaho House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Idaho Senate
Party		Before	After	Change
	Republican	29	28	1
	Democratic	6	7	1
Total		35	35

Idaho House of Representatives
Party		Before	After	Change
	Republican	59	56	3
	Democratic	11	14	3
Total		70	70

Illinois[edit]

Two-thirds of the seats of the Illinois Senate and all of the seats of the Illinois House of Representatives were up for election in 2018. Democrats retained control of both chambers.

Illinois Senate
Party		Before	After	Change
	Democratic	37	40	3
	Republican	22	19	3
Total		59	59

Illinois House of Representatives
Party		Before	After	Change
	Democratic	67	74	7
	Republican	51	44	7
Total		118	118

Indiana[edit]

Half of the seats of the Indiana Senate and all of the seats of the Indiana House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Indiana Senate
Party		Before	After	Change
	Republican	41	40	1
	Democratic	9	10	1
Total		50	50

Indiana House of Representatives
Party		Before	After	Change
	Republican	70	67	3
	Democratic	30	33	3
Total		100	100

Iowa[edit]

Half of the seats of the Iowa Senate and all of the seats of the Iowa House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Iowa Senate
Party		Before	After	Change
	Republican	29	32	3
	Democratic	20	18	2
Total		50	50

Iowa House of Representatives
Party		Before	After	Change
	Republican	59	53	6
	Democratic	41	47	6
Total		100	100

Kansas[edit]

All of the seats of the Kansas House of Representatives were up for election in 2018; the Republican-controlled Kansas Senate did not hold regularly scheduled elections in 2018. Republicans retained control of the House of Representatives.

Kansas House of Representatives
Party		Before	After	Change
	Republican	84	86	1
	Democratic	41	39	2
Total		125	125

Kentucky[edit]

Half of the seats of the Kentucky Senate and all of the seats of the Kentucky House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Kentucky Senate
Party		Before	After	Change
	Republican	27	29	2
	Democratic	11	9	2
Total		38	38

Kentucky House of Representatives
Party		Before	After	Change
	Republican	63	61	2
	Democratic	37	39	2
Total		100	100

Maine[edit]

All of the seats of the Maine Senate and the Maine House of Representatives were up for election in 2018. Democrats gained control of the state senate and retained control of the House of Representatives.

Maine Senate
Party		Before	After	Change
	Democratic	17	21	4
	Republican	18	14	4
Total		35	35

Maine House of Representatives
Party		Before	After	Change
	Democratic	73	89	16
	Republican	70	57	13
	Independent	7	5	2
Total		151	151

Maryland[edit]

All of the seats of the Maryland Senate and the Maryland House of Delegates were up for election in 2018. Democrats retained control of both chambers.

Maryland Senate
Party		Before	After	Change
	Democratic	33	32	1
	Republican	14	15	1
Total		37	37

Maryland House of Delegates
Party		Before	After	Change
	Democratic	92	99	7
	Republican	49	42	7
Total		141	141

Massachusetts[edit]

All of the seats of the Massachusetts Senate and the Massachusetts House of Representatives were up for election in 2018. Democrats control both chambers, and the governor is a member of the Republican Party. Democrats hold a veto-proof supermajority in the state legislature.^[10]

Massachusetts Senate
Party		Before	After	Change
	Democratic	33	34	1
	Republican	7	6	1
Total		40	40

Massachusetts House of Representatives
Party		Before	After	Change
	Democratic	125	127	2
	Republican	35	32	3
Total		160	160

Michigan[edit]

All of the seats of the Michigan Senate and the Michigan House of Representatives were up for election in 2018. Republicans retained control of both chambers, but Democrats picked up enough seats to break the Republican legislative supermajority.^[3]

Michigan Senate
Party		Before	After	Change
	Republican	27	22	5
	Democratic	11	16	5
Total		110	110

Michigan House of Representatives
Party		Before	After	Change
	Republican	63	58	5
	Democratic	47	52	5
Total		110	110

Minnesota[edit]

All of the seats of the Minnesota House of Representatives were up for election in 2018; the Republican-controlled Minnesota Senate did not hold regularly scheduled elections in 2018. Democrats won control of the House of Representatives, making Minnesota the only state in the country where each major party controlled one state legislative chamber.^[2]

Minnesota House of Representatives
Party		Before	After	Change
	Democratic (DFL)	57	75	18
	Republican	77	59	18
Total		134	134

Missouri[edit]

Half of the seats of the Missouri Senate and all of the seats of the Missouri House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Missouri Senate
Party		Before	After
	Republican	24	24
	Democratic	10	10
Total		34	34

Missouri House of Representatives
Party		Before	After	Change
	Republican	113	116	3
	Democratic	45	47	2
Total		163	163

Montana[edit]

Half of the seats of the Montana Senate and all of the seats of the Montana House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Montana Senate
Party		Before	After	Change
	Republican	32	30	2
	Democratic	18	20	2
Total		50	50

Montana House of Representatives
Party		Before	After	Change
	Republican	59	58	1
	Democratic	41	42	1
Total		100	100

Nebraska[edit]

Nebraska is the only U.S. state with a unicameral legislature; half of the seats of the Nebraska Legislature were up for election in 2018. Nebraska is also unique in that its legislature is officially non-partisan and holds non-partisan elections, although the Democratic and Republican parties each endorse legislative candidates. Republicans maintained control.

Nebraska Legislature
Party		Before	After	Change
	Republican	31	30	1
	Democratic	16	18	2
	Independent	1	1
Total		49	49

Nevada[edit]

Half of the seats of the Nevada Senate and all of the seats of the Nevada Assembly were up for election in 2018. Democrats retained control of both chambers.

Nevada Senate
Party		Before	After	Change
	Democratic	12	13	1
	Republican	9	8	1
Total		21	21

Nevada Assembly
Party		Before	After	Change
	Democratic	27	29	2
	Republican	15	13	2
Total		42	42

New Hampshire[edit]

All of the seats of the New Hampshire Senate and the New Hampshire House of Representatives were up for election in 2018. Democrats won control of both chambers.

New Hampshire Senate
Party		Before	After	Change
	Republican	14	10	4
	Democratic	10	14	4
Total		24	24

New Hampshire House of Representatives
Party		Before	After	Change
	Republican	227	166	61
	Democratic	173	234	61
Total		400	400

New Mexico[edit]

All of the seats of the New Mexico House of Representatives were up for election in 2018; the Democratic-controlled New Mexico Senate did not hold regularly scheduled elections in 2018. Democrats retained control of the House of Representatives.

New Mexico House of Representatives
Party		Before	After	Change
	Democratic	39	46	7
	Republican	31	24	7
Total		70	70

New York[edit]

All of the seats of the New York State Senate and the New York State Assembly were up for election in 2018. Democrats won control of the state senate and retained control of the state assembly.

New York State Senate
Party		Before	After	Change
	Democratic	31	40	9
	Republican	32 ^[h]	23	9
Total		63	63

New York State Assembly
Party		Before	After	Change
	Democratic	107	106	1
	Republican	42	43	1
	Independence	1	1
Total		150	150

North Carolina[edit]

All of the seats of the North Carolina Senate and the North Carolina House of Representatives were up for election in 2018. Republicans retained control of both chambers, but Democrats won enough seats to break the Republican legislative super-majority.^[11]

North Carolina Senate
Party		Before	After	Change
	Republican	35	29	6
	Democratic	15	21	6
Total		50	50

North Carolina House of Representatives
Party		Before	After	Change
	Republican	75	65	10
	Democratic	45	55	10
Total		120	120

North Dakota[edit]

Half of the seats of the North Dakota Senate and the North Dakota House of Representatives were up for election in 2018. Republicans retained control of both chambers.

North Dakota Senate
Party		Before	After	Change
	Republican	38	37	1
	Democratic-NPL	9	10	1
Total		47	47

North Dakota House of Representatives
Party		Before	After	Change
	Republican	81	79	2
	Democratic-NPL	13	15	2
Total		94	94

Ohio[edit]

Half of the seats of the Ohio Senate and all of the seats of the Ohio House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Ohio Senate
Party		Before	After
	Republican	24	24
	Democratic	9	9
Total		33	33

Ohio House of Representatives
Party		Before	After	Change
	Republican	66	58	5
	Democratic	32	38	5
Total		99	99

Oklahoma[edit]

Half of the seats of the Oklahoma Senate and all of the seats of the Oklahoma House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Oklahoma Senate
Party		Before	After	Change
	Republican	42	39	3
	Democratic	6	9	3
Total		48	48

Oklahoma House of Representatives
Party		Before	After	Change
	Republican	75	77	2
	Democratic	26	24	2
Total		101	101

Oregon[edit]

Half of the seats of the Oregon State Senate and all of the seats of the Oregon House of Representatives were up for election in 2018. Democrats retained control of both chambers.

Oregon State Senate
Party		Before	After	Change
	Democratic	17	18	1
	Republican	13	12	1
Total		30	30

Oregon House of Representatives
Party		Before	After	Change
	Democratic	35	38	3
	Republican	25	22	3
Total		50	50

Pennsylvania[edit]

Half of the seats of the Pennsylvania State Senate and all of the seats of the Pennsylvania House of Representatives were up for election in 2018. Republicans retained control of both chambers, but Democrats picked up enough seats to break the Republican legislative supermajority.^[3]

Pennsylvania State Senate
Party		Before	After	Change
	Republican	34	29	5
	Democratic	16	21	5
Total		50	50

Pennsylvania House of Representatives
Party		Before	After	Change
	Republican	121	110	11
	Democratic	82	93	11
Total		203	203

Rhode Island[edit]

All of the seats of the Rhode Island Senate and the Rhode Island House of Representatives were up for election in 2018. Democrats retained control of both chambers.

Rhode Island Senate
Party		Before	After
	Democratic	33	33
	Republican	5	5
Total		38	38

Rhode Island House of Representatives
Party		Before	After	Change
	Democratic	64	66	2
	Republican	11	9	2
Total		75	75

South Carolina[edit]

All of the seats of the South Carolina House of Representatives were up for election in 2018; the Republican-controlled South Carolina Senate did not hold regularly scheduled elections in 2018. Republicans retained control of the House of Representatives.

South Carolina House of Representatives
Party		Before	After
	Republican	80	80
	Democratic	44	44
Total		123	123

South Dakota[edit]

All of the seats of the South Dakota Senate and the South Dakota House of Representatives were up for election in 2018. Republicans retained control of both chambers.

South Dakota Senate
Party		Before	After	Change
	Republican	29	30	1
	Democratic	6	5	1
Total		35	35

South Dakota House of Representatives
Party		Before	After	Change
	Republican	60	59	1
	Democratic	10	11	1
Total		70	70

Tennessee[edit]

Half of the seats of the Tennessee Senate and all of the seats of the Tennessee House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Tennessee Senate
Party		Before	After
	Republican	28	28
	Democratic	5	5
Total		33	33

Tennessee House of Representatives
Party		Before	After	Change
	Republican	74	73	1
	Democratic	25	26	1
Total		99	99

Texas[edit]

Half of the seats of the Texas Senate and all of the seats of the Texas House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Texas Senate
Party		Before	After	Change
	Republican	21	19	2
	Democratic	10	12	2
Total		31	31

Texas House of Representatives
Party		Before	After	Change
	Republican	95	83	12
	Democratic	55	67	12
Total		150	150

Utah[edit]

Half of the seats of the Utah State Senate and all of the seats of the Utah House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Utah State Senate
Party		Before	After	Change
	Republican	24	23	1
	Democratic	5	6	1
Total		29	29

Utah House of Representatives
Party		Before	After	Change
	Republican	62	59	3
	Democratic	13	16	3
Total		75	75

Vermont[edit]

All of the seats of the Vermont Senate and the Vermont House of Representatives were up for election in 2018. Democrats retained control of both chambers.

Vermont Senate
Party		Before	After	Change
	Democratic	21	22	1
	Republican	7	6	1
	Progressive	2	2
Total		30	30

Vermont House of Representatives
Party		Before	After	Change
	Democratic	83	95	12
	Republican	53	43	10
	Progressive	7	7
	Independent	7	5	2
Total		150	150

Washington[edit]

Half of the seats of the Washington State Senate and all of the seats of the Washington House of Representatives were up for election in 2018. Democrats retained control of both chambers.

Washington State Senate
Party		Before	After	Change
	Democratic	25 ^[i]	28 ^[j]	3
	Republican	24	21	3
Total		49	49

Washington House of Representatives
Party		Before	After	Change
	Democratic	50	57	7
	Republican	48	41	7
Total		98	98

West Virginia[edit]

Half of the seats of the West Virginia Senate and all of the seats of the West Virginia House of Delegates were up for election in 2018. Republicans retained control of both chambers.

West Virginia Senate
Party		Before	After	Change
	Republican	22	20	2
	Democratic	12	14	2
Total		34	34

West Virginia House of Delegates
Party		Before	After	Change
	Republican	64	57	7
	Democratic	36	43	7
Total		100	100

Wisconsin[edit]

Half of the seats of the Wisconsin State Senate and all of the seats of the Wisconsin State Assembly were up for election in 2018. Republicans retained control of both chambers.

Wisconsin Senate
Party		Before	After	Change
	Republican	18	19	1
	Democratic	15	14	1
Total		33	33

Wisconsin State Assembly
Party		Before	After	Change
	Republican	64	63	1
	Democratic	35	36	1
Total		99	99

Wyoming[edit]

Half of the seats of the Wyoming Senate and all of the seats of the Wyoming House of Representatives were up for election in 2018. Republicans retained control of both chambers.

Wyoming Senate
Party		Before	After
	Republican	27	27
	Democratic	3	3
Total		30	30

Wyoming House of Representatives
Party		Before	After	Change
	Republican	51	50	1
	Democratic	9	9
Total		60	60

Territorial and federal district summaries[edit]

American Samoa[edit]

All of the seats of the American Samoa House of Representatives were up for election. Members of the House of Representatives serve two-year terms. Gubernatorial and legislative elections are conducted on a nonpartisan basis in American Samoa.

Guam[edit]

All of the seats of the unicameral Legislature of Guam were up for election. All members of the legislature serve a two-year term. Democrats retained control of the legislature.

Guam Legislature
Party		Before	After	Change
	Democratic	9	10	1
	Republican	6	5	1
Total		15	15

Northern Mariana Islands[edit]

A portion of the seats of the Northern Mariana Islands Senate, and all of the seats of the Northern Mariana Islands House of Representatives, were up for election. Members of the senate serve either four-year terms, while members of the house serve two-year terms. Republicans maintained control of both chambers.

Northern Mariana Islands Senate^[12]
Party		Before	After	Change
	Republican	7	6	1
	Independent	2	3	1
	Democratic	0	0
Total		9	9

Northern Mariana Islands House of Representatives^[13]
Party		Before	After	Change
	Republican	15	13	2
	Democratic	0	0
	Independent	5	7	2
Total		20	20

U.S. Virgin Islands[edit]

All of the seats of the unicameral Legislature of the Virgin Islands were up for election. All members of the legislature serve a two-year term. Democrats retained control of the legislature.

Virgin Islands Legislature
Party		Before	After	Change
	Democratic	11	13	2
	Independent	4	2	2
Total		15	15

Washington, D.C.[edit]

The Council of the District of Columbia serves as the legislative branch of the federal district of Washington, D.C. Half of the council seats are up for election. Council members serve four-year terms. Democrats retained supermajority control of the council.

District of Columbia Council
Party		Before	After
	Democratic	11	11
	Independent	2	2
Total		13	13

Special elections[edit]

Various states will hold special elections for legislative districts throughout the year.^[14]

Alabama[edit]

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
House	21	Jim Patterson	Republican	2010	Incumbent died October 2, 2017, of heart attack. New member elected March 27, 2018. Republican hold.	▌ Y Rex Reynolds (Republican) 52.8% ▌ C. Terry Jones (Democratic) 47.1%
House	4	Micky Hammon	Republican	2002	Incumbent resigned September 11, 2017. New member elected May 15, 2018. Republican hold.	▌ Y Parker Moore (Republican) 65.0% Jo Ann Cummings (Democratic) 25.4% Pete Wills (Independent) 9.5%
Senate	26	Quinton T. Ross, Jr.	Democratic	2002	Incumbent resigned October 2, 2017, to become the president of Alabama State University New member elected May 15, 2018. Democratic hold.	▌ Y David Burkette (Democratic) 89.3% ▌ D.J. Johnson(Republican) 10.4%

New Jersey[edit]

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates^[15]^[16]
Senate	38	Robert M. Gordon	Democratic	2007	Incumbent resigned April 4, 2018, to join the New Jersey Board of Public Utilities.^[17] New member elected November 6, 2018. Democratic hold.	▌ Y Joseph Lagana (Democratic) 60.1% ▌ Daisy Ortiz Berger (Republican) 39.9%
Assembly	5	Arthur Barclay	Democratic	2015	Incumbent resigned June 18, 2018, following arrest for assault.^[18] New member elected November 6, 2018. Democratic hold.	▌ Y William Spearman (Democratic) 66.3% ▌ Nicholas Kush (Republican) 33.7%
Assembly	15	Elizabeth Maher Muoio	Democratic	2015 (appointed)	Incumbent resigned January 15, 2018, to become State Treasurer of New Jersey.^[19] New member elected November 6, 2018. Democratic hold.	▌ Y Verlina Reynolds-Jackson (Democratic) 72.0% ▌ Tracy R. Sinatra (Republican) 26.4% ▌ Ed Forchion (Repeal Bail Reform) 1.6%
Assembly	15	Reed Gusciora	Democratic	1995	Incumbent resigned June 30, 2018, to become Mayor of Trenton.^[20] New member elected November 6, 2018. Democratic hold.	▌ Y Anthony Verrelli (Democratic) 71.5% ▌ Justin Tibbetts (Republican) 25.5% ▌ Alex Bethea (Integrity Transparency Accountability) 3.0%
Assembly	22	Jerry Green	Democratic	1991	Incumbent died April 18, 2018, from a long illness.^[21] New member elected November 6, 2018. Democratic hold.	▌ Y Linda S. Carter (Democratic) 69.4% ▌ John Quattrocchi (Republican) 30.6%
Assembly	32	Vincent Prieto	Democratic	2004 (appointed)	Incumbent resigned February 26, 2018, to become President and CEO of the New Jersey Sports and Exposition Authority.^[22] New member elected November 6, 2018. Democratic hold.	▌ Y Pedro Mejia (Democratic) 100.0%
Assembly	34	Sheila Oliver	Democratic	2003	Incumbent resigned January 9, 2018, to become Lieutenant Governor of New Jersey.^[23] New member elected November 6, 2018. Democratic hold.	▌ Y Britnee Timberlake (Democratic) 81.9% ▌ Irene DeVita (Republican) 16.6% ▌ Clenard Howard Childress Jr. (Stop the Insanity) 1.5%
Assembly	36	Marlene Caride	Democratic	2011	Incumbent resigned January 16, 2018, to become Commissioner of the New Jersey Department of Banking and Insurance.^[24] New member elected November 6, 2018. Democratic hold.	▌ Y Clinton Calabrese (Democratic) 63.8% ▌ Marc Marsi (Republican) 36.2%
Assembly	38	Joseph Lagana	Democratic	2013	Incumbent resigned April 12, 2018, to join the State Senate.^[25] New member elected November 6, 2018. Democratic hold.	▌ Y Lisa Swain (Democratic) 59.7% ▌ Gail Horton (Republican) 40.3%
Assembly	38	Tim Eustace	Democratic	2011	Incumbent resigned April 13, 2018, to become Deputy Director of the North Jersey District Water Supply Commission.^[26] New member elected November 6, 2018. Democratic hold.	▌ Y Chris Tully (Democratic) 59.3% ▌ Jayme Ouellette (Republican) 40.7%

Notes[edit]

^ The Connecticut Senate was tied in the 2017-2019 session, but Democrats gained control in the 2018 elections. This chamber was not included in the previous total.
^ ^a ^b The Alaska House of Representatives is controlled by a coalition of Democrats, Republicans, and independents. The minority caucus consists of Republicans who are not part of the majority coalition.
^ On April 16, 2018, the Independent Democratic Conference, which had been in coalition with Republicans since 2012, dissolved, returning the chamber to Republican control.^[1]
^ ^a ^b ^c ^d ^e ^f ^g ^h The upper houses of Arkansas, Delaware, Florida, Hawaii, Illinois, Minnesota, New Jersey, and Texas use a 2-4-4 term length system.
^ ^a ^b ^c These figures represent the seats of Nebraska's unicameral legislature.
^ Coalition consisted of 17 Democrats, 3 Republicans, and 2 Independents.
^ Coalition consisted of 15 Democrats, 8 Republicans, and 2 Independents.
^ Includes Democrat Simcha Felder that cuascused with the Republicans until after the elections, and is therefore counted as a Republican loss.
^ One Democrat caucused with the Republicans
^ One Democrat caucused with the Republicans

References[edit]

^ Wang, Vivian (April 16, 2018). "As Session Resumes, a Democratic Truce in Albany Seems Uneasy". The New York Times. Retrieved April 16, 2018.
^ ^a ^b Quinton, Sophie; Povich, Elaine S. (November 9, 2018). "So Much Changed in Statehouses This Week. Here's What It All Means". Stateline. The Pew Charitable Trusts.
^ ^a ^b ^c ^d Rogers, Steven (November 12, 2018). "The blue wave was big—and significant—in state legislatures". Washington Post. Retrieved November 12, 2018.
^ ^a ^b NCSL State Vote, National Conference of State Legislatures.
^ Jim Morrill & Paul A. Specht, Blue waves in urban North Carolina help Democrats break GOP 'supermajorities', Charlotte Observer (November 7, 2018).
^ Connor Radnovich, Oregon Democrats secure supermajorities in both chambers of Oregon Legislature, Salem Statesman Journal (November 7, 2018).
^ Wildermuth, John (November 13, 2018). "Nearly a Week After Election Day, California Democrats Regain Supermajority in Legislature". Governing. Retrieved November 13, 2018.
^ ^a ^b ^c "2018 Legislative Races by State and Legislative Chamber". National Conference of State Legislatures.
^ Wilson, Reid (February 15, 2019). "Alaska House elects a Speaker after more than a month of gridlock". The Hill.
^ Young, Colin A.; Lannan, Katie (November 7, 2018). "Democrats Further Solidify Super-Majorities In The Mass. House And Senate". WBUR News.
^ Jim Morrill & Paul A. Specht, Blue waves in urban North Carolina help Democrats break GOP 'supermajorities', Charlotte Observer (November 7, 2018).
^ "Northern Mariana Islands Senate". Ballotpedia. November 4, 2020. Retrieved January 12, 2021.
^ "Northern Mariana Islands House of Representatives". Ballotpedia. November 4, 2020. Retrieved January 12, 2021.
^ "State legislative special elections, 2021". Ballotpedia.
^ "Official List, Candidates for State Senate For GENERAL ELECTION 11/06/2018 Election" (PDF). Secretary of State of New Jersey. December 3, 2018. Retrieved July 31, 2022.
^ "Official List, Candidates for General Assembly For GENERAL ELECTION 11/06/2018 Election" (PDF). Secretary of State of New Jersey. December 3, 2018. Retrieved July 31, 2022.
^ Tate, Curtis (April 5, 2018). "Gov. Phil Murphy appoints Sen. Bob Gordon to NJ utility watchdog". NorthJersey.com. Retrieved April 14, 2018.
^ Trethan, Phaedra (June 18, 2018). "Assemblyman Arthur Barclay resigns after arrest for simple assault". Courier-Post. Retrieved June 18, 2018.
^ Curran, Phillip Sean. "Assemblywoman Muoio resigns, creating vacancy in legislature" Archived 2018-09-23 at the Wayback Machine, CentralJersey.com, January 17, 2018.
^ Abdur-Rahman, Sulaiman (July 26, 2018). "Mercer Freeholder Verrelli wins appointment to Gusciora's vacant Assembly seat". The Trentonian. Retrieved August 12, 2018.
^ Pizarro, Max (April 19, 2018). "Rest in Peace, Assemblyman and Union County Democratic Chairman Jerry Green of Plainfield". Insider NJ. Retrieved April 21, 2018.
^ Johnson, Brent (February 15, 2018). "Ex-Assembly speaker Prieto lands $280K job as head of N.J. sports authority". NJ.com. Retrieved March 25, 2018.
^ O'Dea, Colleen (January 10, 2018). "Who's Who, Who's New, And Who's Blue In 218th Legislative Session". NJ Spotlight. Retrieved January 13, 2018.
^ Blosfield, Elizabeth (February 14, 2018). "Caride Named Acting Commissioner of N.J. Department of Banking and Insurance". Insurance Journal. Retrieved June 18, 2018.
^ Van Vliet, John (April 4, 2018). "Assemblyman Joseph Lagana to Succeed Senator Bob Gordon in the 38th District". TAPinto. Retrieved April 14, 2018.
^ Kanzler, Kaitlyn (April 12, 2018). "Tim Eustace to become deputy director of North Jersey District Water Supply Commission". NorthJersey.com. Retrieved April 14, 2018.

[CTSenate-1] The Connecticut Senate was tied in the 2017-2019 session, but Democrats gained control in the 2018 elections. This chamber was not included in the previous total.

[AKhouse-2] The Alaska House of Representatives is controlled by a coalition of Democrats, Republicans, and independents. The minority caucus consists of Republicans who are not part of the majority coalition.

[NYsenate-4] On April 16, 2018, the Independent Democratic Conference, which had been in coalition with Republicans since 2012, dissolved, returning the chamber to Republican control.^[1]

[variabletermlength-12] ^ ^a ^b ^c ^d ^e ^f ^g ^h The upper houses of Arkansas, Delaware, Florida, Hawaii, Illinois, Minnesota, New Jersey, and Texas use a 2-4-4 term length system.

[Nebraska_seats-13] These figures represent the seats of Nebraska's unicameral legislature.

[15] Coalition consisted of 17 Democrats, 3 Republicans, and 2 Independents.

[16] Coalition consisted of 15 Democrats, 8 Republicans, and 2 Independents.

[18] Includes Democrat Simcha Felder that cuascused with the Republicans until after the elections, and is therefore counted as a Republican loss.

[20] One Democrat caucused with the Republicans

[21] One Democrat caucused with the Republicans

[auto1-3] Wang, Vivian (April 16, 2018). "As Session Resumes, a Democratic Truce in Albany Seems Uneasy". The New York Times. Retrieved April 16, 2018.

[statelegdivided-5] Quinton, Sophie; Povich, Elaine S. (November 9, 2018). "So Much Changed in Statehouses This Week. Here's What It All Means". Stateline. The Pew Charitable Trusts.

[rogers1-6] Rogers, Steven (November 12, 2018). "The blue wave was big—and significant—in state legislatures". Washington Post. Retrieved November 12, 2018.

[ncslstatevote-7] NCSL State Vote, National Conference of State Legislatures.

[8] Jim Morrill & Paul A. Specht, Blue waves in urban North Carolina help Democrats break GOP 'supermajorities', Charlotte Observer (November 7, 2018).

[9] Connor Radnovich, Oregon Democrats secure supermajorities in both chambers of Oregon Legislature, Salem Statesman Journal (November 7, 2018).

[10] Wildermuth, John (November 13, 2018). "Nearly a Week After Election Day, California Democrats Regain Supermajority in Legislature". Governing. Retrieved November 13, 2018.

[seatsup-11] "2018 Legislative Races by State and Legislative Chamber". National Conference of State Legislatures.

[14] Wilson, Reid (February 15, 2019). "Alaska House elects a Speaker after more than a month of gridlock". The Hill.

[17] Young, Colin A.; Lannan, Katie (November 7, 2018). "Democrats Further Solidify Super-Majorities In The Mass. House And Senate". WBUR News.

[19] Jim Morrill & Paul A. Specht, Blue waves in urban North Carolina help Democrats break GOP 'supermajorities', Charlotte Observer (November 7, 2018).

[22] "Northern Mariana Islands Senate". Ballotpedia. November 4, 2020. Retrieved January 12, 2021.

[23] "Northern Mariana Islands House of Representatives". Ballotpedia. November 4, 2020. Retrieved January 12, 2021.

[24] "State legislative special elections, 2021". Ballotpedia.

[25] "Official List, Candidates for State Senate For GENERAL ELECTION 11/06/2018 Election" (PDF). Secretary of State of New Jersey. December 3, 2018. Retrieved July 31, 2022.

[26] "Official List, Candidates for General Assembly For GENERAL ELECTION 11/06/2018 Election" (PDF). Secretary of State of New Jersey. December 3, 2018. Retrieved July 31, 2022.

[27] Tate, Curtis (April 5, 2018). "Gov. Phil Murphy appoints Sen. Bob Gordon to NJ utility watchdog". NorthJersey.com. Retrieved April 14, 2018.

[28] Trethan, Phaedra (June 18, 2018). "Assemblyman Arthur Barclay resigns after arrest for simple assault". Courier-Post. Retrieved June 18, 2018.

[29] Curran, Phillip Sean. "Assemblywoman Muoio resigns, creating vacancy in legislature" Archived 2018-09-23 at the Wayback Machine, CentralJersey.com, January 17, 2018.

[30] Abdur-Rahman, Sulaiman (July 26, 2018). "Mercer Freeholder Verrelli wins appointment to Gusciora's vacant Assembly seat". The Trentonian. Retrieved August 12, 2018.

[31] Pizarro, Max (April 19, 2018). "Rest in Peace, Assemblyman and Union County Democratic Chairman Jerry Green of Plainfield". Insider NJ. Retrieved April 21, 2018.

[32] Johnson, Brent (February 15, 2018). "Ex-Assembly speaker Prieto lands $280K job as head of N.J. sports authority". NJ.com. Retrieved March 25, 2018.

[33] O'Dea, Colleen (January 10, 2018). "Who's Who, Who's New, And Who's Blue In 218th Legislative Session". NJ Spotlight. Retrieved January 13, 2018.

[34] Blosfield, Elizabeth (February 14, 2018). "Caride Named Acting Commissioner of N.J. Department of Banking and Insurance". Insurance Journal. Retrieved June 18, 2018.

[35] Van Vliet, John (April 4, 2018). "Assemblyman Joseph Lagana to Succeed Senator Bob Gordon in the 38th District". TAPinto. Retrieved April 14, 2018.

[36] Kanzler, Kaitlyn (April 12, 2018). "Tim Eustace to become deputy director of North Jersey District Water Supply Commission". NorthJersey.com. Retrieved April 14, 2018.

[b]

[c]

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[2]

[3]

[4]

[5]

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[7]

[8]

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[e]

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[f]

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[10]

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[11]

[i]

[j]

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[15]

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[1]

(2017 ←) 2018 United States elections (→ 2019)
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