Károly Peyer
 Károly Peyer (9 May 1881 – 25 October 1956) was a Hungarian politician who served as Interior Minister for six days during the end of the Hungarian Soviet Republic in 1919. He was later Minister of Works in the cabinets of István Friedrich and Károly Huszár. He took part in the consolidation policy of István Bethlen in 1921: as the leader of the main opposition party (the Hungarian Social Democratic Party) he compromised with the Prime Minister (the Bethlen-Peyer Pact).