Slager is a Dutch occupational surname meaning "butcher". Notable people with the surname include:
Denzel Slager (born 1993), Dutch football striker Don Slager (born 1963), American corporate director Hal Slager (born ?), American (Indiana) Republican politician Joan Slager, American nurse midwife and academic administrator Johan Slager (1946–2025), Dutch rock guitarist Michael Slager (born 1981), American police officer who shot Walter Scott (1880–1943), Dutch violinist (1841–1912), Dutch painter Rick Slager (born 1954), American football player
See also Museum Slager, a museum showing the paintings of Piet Slager Sr. and seven of his descendants