Blair is a name of Scottish Gaelic origin, 'blàr' meaning field or plain. It may be either a first or last name. The following are some notable persons named Blair:

As a surname

• Anthony Blair (criminal) (1849-1879), American hanged for murder
• Bill Blair (disambiguation)
• Bonnie Blair (born 1964), Olympic gold medalist in speed skating
• Danny Blair, Scottish footballer
• David Blair (disambiguation)
• DeJuan Blair (born 1989), American basketball player
• Dennis C. Blair, United States Director of National Intelligence
• Doug Blair, footballer
• Eric Blair, an author better known by his pen name George Orwell
• Francis Preston Blair (1791-1876), Influential 19th Century American Journalist and Politician
• Francis Preston Blair, Jr. (1821-1875), 19th century American politician and American Civil War General
• Harold Blair, Australian tenor and Aboriginal activist
• Henry Blair (child actor), featured actor of Sparky's Magic Piano, a series of children’s audio stories
• Henry W. Blair (1834–1920), United States Representative and Senator from New Hampshire
• Hugh Blair (1718–1800), Scottish author
• Hugh Blair (composer) (1864–1932), English musician, composer and organist
• Hugh E. Blair (1909–1967), linguist and co-developer of Interlingua
• Sir Ian Blair, former Commissioner of the Metropolitan Police, London
• Iain Blair (1942–2011), Scottish journalist, actor and author
• James Blair (clergyman), Scottish clergyman and founder of the College of William and Mary
• Jayson Blair, former New York Times reporter
• Jimmy Blair (footballer born 1888) (1888–1964), former Scottish international footballer
• Jimmy Blair (footballer born 1918) (1918–1983), Scottish professional footballer
• John Blair, 18th-century American politician and one of the first Associate Justices of the U.S. Supreme Court
• John Insley Blair, railroad tycoon
• John Leo Blair, businessman, founder of Blair Corporation
• Linda Blair (born 1959), American actress
• Lionel Blair, entertainer
• Mike Blair (born 1981), Scotland rugby union international
• Montgomery Blair, American politician and lawyer
• Natalie Blair, Australian actress
• Preston Blair (1908–1994), American animator for Disney, MGM, and Hanna-Barbera
• Robert Blair (disambiguation)
• Selma Blair, actress
• G. W. Scott Blair (1902–1987) rheologist
• Tony Blair (born 1953), the former Prime Minister of the United Kingdom
• Leo Blair (senior) (father of Tony Blair)
• Cherie Blair (born 1954), British barrister and wife of Tony Blair

For the High School in the United States, see Montgomery Blair High School

As a given name

• Blair (no last name given), a fictional character in the Soul Eater manga and anime series
• Blair Brown, actress
• Blair Chenoweth, beauty queen
• Blair Cramer, fictional character on One Life to Live
• Blair Dame, a fictional character in the videogame Street Fighter EX
• Blair Horn, Canadian rower
• Blair Hull, American businessman and politician
• Blair MacKichan, English musician
• Blair McDonough, Australian actor
• Blair Peach, New Zealand-born teacher and alleged victim of police brutality
• Blair Redford, American actor
• Blair Underwood, actor
• Blair Waldorf, fictional character in Gossip Girl
• Blair Yaworski (born 1985), Canadian professional ice hockey player