Killinger is a surname. Notable people with the surname include:
Dana W. Killinger (1936–2001) American lawyer and pharmacist who served a one year term in the Kansas State Senate Frans Killinger (1875–1936), Hungarian-born military officer and Suriname police officer who committed the first coup d'etat in Suriname. Glenn Killinger (1898–1988), American football, basketball, and baseball player, coach, and college athletics administrator John Weinland Killinger (1824–1896), American politician Kerry Killinger (born 1949), American businessman Manfred Freiherr von Killinger (1886–1944), German naval officer, Freikorps leader, military writer and Nazi politician