Gainer (surname)
Gainer is a surname. Notable people with the name include:
- Aaron Gainer, member of American Christian post-grunge band '12 Stones'
- Alice Gainer, American television reporter
- Amari Gainer, American football player
- Del Gainer, American baseball player
- Derrick Gainer (American football), American football player
- Derrick Gainer, American boxer
- Sir Donald Gainer, British ambassador
- Elmer Gainer, American basketball player
- Forrest Gainer, Canadian rugby player
- Frank Gainer, Canadian politician
- Glen Gainer Jr., American politician
- Glen Gainer III, American politician
- Jay Gainer, American baseball player
- John L. Gainer, American chemical engineer
- Ronald William Gainer, American Catholic priest, appointed Bishop of Harrisburg in 2014
- Steve Gainer, American cinematographer
- Terrance W. Gainer, Sergeant at Arms of the United States Senate 2007–14