Weinmann is a German surname meaning "vine man". Notable people with the surname include:
Ariel Weinmann (born 1984), U.S. Navy Seaman Recruit guilty of espionage and desertion Johann Anton Weinmann (1782–1858), German botanist and mycologist Leon Weinmann (born 1972), American poet and scholar
Markus Weinmann (born 1974), German agricultural scientist Nico Weinmann (born 1972), German politician
Jeanne Fox Weinmann (1874–1962), American clubwoman
See also Weinmannia Weinman