Seidemann is a surname. Notable people with the surname include:
Bob Seidemann (1941–2017), American graphic artist and photographer Hans Seidemann (1901–1967), German general during World War II Melissa Seidemann (born 1990), American water polo player Siegfried Seidemann, East German slalom canoeist in the late 1950s Ulricke Seidemann (born 1955), German chess master
See also Scheidemann Seidelmann (disambiguation) Seidman (disambiguation)