John Strong may refer to:

• John Strong (mariner), English captain who made the first recorded landing on the Falkland Islands, in 1690
• John Strong (Michigan politician) (1830–1913), politician from the U.S. state of Michigan
• John Strong (Vermont politician) (1738–1816), American politician
• John Franklin Alexander Strong (1856–1929), Alaskan politician
• John Strong (educationalist) (1868–1945), British educationalist
• John Clifford Strong (1922–2003), British governor of the Turks and Caicos, 1978–1982
• John Anderson Strong (1915–2012), Scottish surgeon and academic
• John D. Strong (1905–1992), professor of physics and astronomy
• John S. Strong (born 1948), American religion academic
• John Strong (actor) (born 1969), Ukrainian pornographic actor and director
• Johnny Strong (born 1974), American actor and composer
• John Strong (sportscaster) (born 1985), American television sportscaster
• John Strong (colonist) (1610–1699), English-born New England colonist and politician
• John Strong Sr. (1798–1881), English–American farmer and politician

• Mrs. John L. Strong, a privately held American luxury company and manufacturer of custom papers and stationery

• Jack Strong (disambiguation)
• John Strong Newberry (1822–1892), U.S. geologist
• John Stronge of the Stronge baronets