Gustav Lehmann
Gustav Lehmann is the name of the following people:
- Gustav Lehmann (botanist) (1853–1928), German educator and botanist
- Gustav Lehmann (politician) (1855-1926), German journalist and politician (SPD)
- Gustav Lehmann (painter) (1883–1914), Austrian-German painter and graphic artist
- Gustav Adolf Lehmann (* 1942), German historian