Thalheimer is a surname. Notable people with the surname include:
August Thalheimer (1884–1948), a German Marxist theorist Bertha Thalheimer (1883–1959), a German Communist Party member Paul Thalheimer (1884–1948), a German painter Peter Thalheimer (1936–2018), a Canadian lawyer and politician Ricardo Thalheimer (born 1992), a Brazilian footballer Richard Thalheimer, an American investor
See also Thalhimers, an American department store founded by William Thalhimer Thalhimer Tennis Center, a facility at the Virginia Commonwealth University