Freisler (also spelled Freissler) is a German surname. Notable people with the surname include:
Anton Freissler (1838–1916), Austrian elevator manufacturer Fritz Freisler (1881–1955), Austrian screenwriter and film director Marion Freisler (1910–1997), wife of Roland Oswald Freisler (1895–1939), German lawyer, brother of Roland Roland Freisler (1893–1945), German jurist