Kohlmann is a German surname. Notable people with the surname include:
Anneliese Kohlmann (1921–1977), German SS camp guardAnthony Kohlmann (1771–1836), French Roman Catholic missionary and military chaplainClarence Kohlmann (1891–1944), American composerEvan Kohlmann (born 1979), American writerFabienne Kohlmann (born 1989), German hurdlerJanine Kohlmann (born 1990), German modern pentathleteMichael Kohlmann (born 1974), German tennis playerPatricia Kohlmann (born 1968), Mexican swimmerPatrick Kohlmann (born 1983), German/Irish footballerRalph Kohlmann, American lawyer and United States Marine Corps officer