Reiner

Reiner may refer to:
 * Reiner (crater), a crater on the Moon, named after Vincentio Reiner

People with the given name Reiner

 * Reiner Knizia, a board game designer
 * Reiner Schöne (born 1942), German actor

People with the surname Reiner

 * Alysia Reiner (born 1970), American actress
 * Carl Reiner (1922–2020), American film director, screenwriter, actor and father of Rob Reiner
 * Charles Reiner (1924–2006), Canadian pianist of Hungarian birth
 * Charles Reiner (cricketer) (1884–1947), English cricketer
 * Daniel Reiner (born 1941), French politician
 * Franz Reiner (1912–?), Swiss sprint canoer
 * Fritz Reiner, early-20th-century Hungarian conductor
 * Grete Reiner (1885–1944), Czech-German magazine editor and writer
 * Herbert Reiner Jr., American diplomat
 * Ira Reiner, American lawyer and politician
 * Irving Reiner, American mathematician
 * Jared Reiner, American professional basketball player
 * Keani Reiner (1952–1994), Hawaiian surfer and sailor
 * Lucas Reiner (born 1960), American painter, printmaker, photographer, filmmaker and son of Carl Reiner
 * Markus Reiner, engineer and scientist, one of the founders of rheology
 * Rob Reiner (born 1947), American film director, screenwriter, actor and son of Carl Reiner
 * Robert Reiner (businessman) (1880–1960), machinist, entrepreneur and businessman
 * Vincentio Reiner (Renieri, Reinieri), a 17th-century Italian astronomer and mathematician

Fictional characters

 * Reiner Braun (Attack on Titan), a character in the manga series Attack on Titan all seasons (Shingeki no Kyojin)