Trainor is a surname of British origin, prevalent in English-speaking countries.^[1] It may refer to the following notable people:

• Bernard E. Trainor (1928–2018), American journalist and marine officer
• Bobby Trainor (1934 – c. 2020), Northern Irish association footballer
• Charles St. Clair Trainor (1901–1978), Canadian lawyer, judge, and politician
• Conor Trainor (born 1989), Canadian rugby union player
• Danny Trainor (1944–1974), Northern Irish association footballer
• David Owen Trainor, 20th- and 21st-century American former television director
• James E. Trainor III, contemporary American lawyer and government official
• Jerry Trainor (born 1977), American actor, comedian, and musician
• Jim Trainor, American experimental filmmaker and animator
• Jordan Trainor (born 1996), New Zealand rugby union player
• Kendall Trainor (born 1967), American former gridiron football player
• Kevin Trainor, contemporary Irish actor
• Kim Trainor, contemporary Canadian poet
• Larry Trainor (1905–1975), American political activist
• Luke Trainor (1900–1973), Australian rules footballer
• Martyn Trainor (born 1944), South African former naval officer
• Mary Ellen Trainor (1952–2015), American actress
• Meghan Trainor (born 1993), American singer
• Mike Trainor (born 1981), American stand-up comedian and writer
• Nicholas Trainor (born 1975), English former cricketer
• Owen Trainor (1894–1956), Canadian politician and Member of Parliament
• Patrick F. Trainor (1863–1902), American politician
• Peter Trainor (1915–1973), English association footballer
• Rick Trainor (born 1948), American-British academic administrator and historian
• Wes Trainor (1921–1991), Canadian ice hockey player

• Trainer
• Gabrielle Trainor Medal