John Blair

• John Blair Sr. ({{circa}}1687–1771), American merchant and politician in the colony of Virginia
• John Blair Jr. (1732–1800), American politician, Founding Father and jurist
• John Blair (Tennessee politician) (1790–1863), American politician
• John Blair (Northern Ireland politician) (born 1966), Member of the Legislative Assembly for South Antrim
• John Knox Blair (1873–1950), Canadian politician, physician and teacher
• John Rutherfurd Blair (1843–1914), New Zealand politician

• John Blair (1890s footballer), Scottish footballer active 1894–1899
• John Blair (footballer, born 1898) (1898–1971), Scottish footballer (Partick Thistle)
• John Blair (English footballer), top scorer in the 1923–24 Oldham Athletic A.F.C. season
• John Blair (footballer, born 1905) (1905–1974), Scottish footballer (Third Lanark, Tottenham Hotspur, Sheffield United)
• John Blair (footballer, born 1910) (1910–1975), Scottish footballer (Motherwell and Scotland)
• John Blair (Australian footballer) (born 1955), Australian rules footballer
• John Blair (rugby union) (c. 1871–1911), New Zealand rugby union player

• John Blair (historian) (born 1955), British historian, archaeologist, and academic
• John Blair (pastor) (1720–1771), Presbyterian minister
• John Blair (priest) (died 1782), British clergyman and chronologist
• John Blair (writer) (born 1961), American poet, novelist, and short-story writer
• John Blair (musician), American violinist on the 1973 album Song of the New World
• John Blair (painter) (1849–1934), Scottish painter
• John Blair (surgeon) (1928–2023), Scottish surgeon
• John Hamilton Blair (1889–1972), Scottish mariner
• John Hunter Blair (1903–1964), British television producer
• John Insley Blair (1802–1899), American entrepreneur, railroad magnate, and philanthropist
• John Leo Blair (1888–1962), American businessman
• John T. Blair (1885–1976), American architect and builder

• John Hamilton of Blair (c. 1638–1690), 17th-century Scottish bishop
• John Insley Blair Larned (1881–1955), American Episcopal bishop
• Jon Blair (born 1950), South African-born writer and filmmaker
• Jon Blair Hunter, American politician active 1996–2008
• {{in title|John Blair}}

{{human name disambiguation|Blair, John}}