Kahl is a German surname. Notable people with the surname include:
Alfred Kahl (1877–1946), German academic
Bruno Kahl (1914–1999), German Wehrmacht officer
Chris Kahl (born 1977), American musician
Daniel Kahl (born 1960), American-Japanese television personality
Gordon Kahl (1920–1983)
Milt Kahl (1909–1987), American animator
Nick Kahl, American politician
Nick Kahl (baseball) (1879–1959), American baseball player