Tetzlaff is a surname of Slavic origin that can refer to:
Christian Tetzlaff (born 1966), German violinist
Dale H. "Ted" Tetzlaff (1903–1995), American cinematographer
Doris Tetzlaff (1921–1998), infielder in the All-American Girls Professional Baseball League
Percy Tetzlaff (1920–2009), New Zealand rugby player
Rob Tetzlaff (1935–2012), American Olympic cyclist
Teddy Tetzlaff (1883–1929), American racecar driver
Toni Tetzlaff (1871–1947), German actress
