Havemann is a German surname. Notable people with the surname include:
Florian Havemann (born 1952), German writer, painter, composer and judge Gustav Havemann (1882–1960), German violinist Katja Havemann (born 1947), German activist and writer Robert Havemann (1910–1982), East German chemist and dissident Sara Hagemann (born 1979), Danish academic and expert on European politics