Thielemann is a German surname. Notable people with the surname include:
Alfred Thielemann (1869–1954), Norwegian sport shooter Christian Thielemann (born 1959), German conductor Ferdinand Thielemann (1803–1863), Danish architect Friedrich-Karl Thielemann (born 1951), German/Swiss theoretical astrophysicist Heino Thielemann (1923–2015), German field hockey player R. C. Thielemann (born 1955), former American football player Ronny Thielemann (born 1973), former German football player Ursula Thielemann (born 1960), former German field hockey player
See also 17882 Thielemann, main-belt asteroid, named after John Seth Thielemann (born 1986)
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