Fritz Heinrich Angerstein (January 3, 1891 – November 17, 1925) was a German mass murderer, who killed 8 people at his home in Haiger, on December 1, 1924.
The subject of a media spectacle, Angerstein, along with Fritz Haarmann and Peter Kürten, is considered one of the "three great mass murderer trials" of the Weimar Republic-era of Germany.
Angerstein was sentenced to death eight times, and was executed in 1925.