Sven Lehmann (born 14 December 1979) is a German government official and politician of Alliance 90/The Greens. He has been serving as a member of the Bundestag from the state of North Rhine-Westphalia since 2017. He has been serving as Parliamentary State Secretary in the Federal Ministry of Family Affairs, Senior Citizens, Women and Youth and as the Federal Government's Commissioner for the Acceptance of Sexual and Gender Diversity (nicknamed the "Queer Commissioner") in the coalition government of Chancellor Olaf Scholz since 2021.