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 (born 1982), American television reporter
 * Del Gainer (1886–1947), American baseball player
 * Derrick Gainer (American football) (born 1966), American football player
 * Derrick Gainer (born 1972), American boxer
 * Sir Donald Gainer (1891–1966), British ambassador
 * Elmer Gainer (1918–1970), American basketball player
 * Forrest Gainer (born 1979), Canadian rugby player
 * Frank Gainer (1888–1975), Canadian politician
 * Glen Gainer Jr. (1927–2009), American politician
 * Glen Gainer III (born 1960), American politician
 * Jay Gainer (born 1966), American baseball player
 * John L. Gainer (born 1938), American chemical engineer
 * Ronald William Gainer (born 1947), American Catholic priest, appointed Bishop of Harrisburg in 2014
 * Steve Gainer (born 1962), American cinematographer
 * Terrance W. Gainer (born 1947), Sergeant at Arms of the United States Senate 2007–14