Demmler is a surname. Notable people with the surname include:
Georg Adolph Demmler (1804–1886), German architect and politician Kurt Demmler (1943–2009), German songwriter, accused of sexual abuse he hanged himself in his Berlin jail cell. Ralph H. Demmler (1904–1995), American lawyer Steven E. Demmler Sr. (1952-), Chief Props at Saturday Night Live for 47 seasons. Steven E. Demmler Jr. (1985-), Founder of Talon Entertainment Finance a film equity and debt investment vehicle and private equity firm that owns and operates soundstages around the world.