Thumann is a German surname. Notable people with the surname include:
Anton Thumann (1912–1946), German SS-Obersturmführer and Nazi concentration camp personnel Harry Thumann (1952–2001), German electronic composer, record producer and sound engineer Karl Borromäus Thumann (1820–1874), German theologian and vicar general Paul Thumann (1834–1908), German illustrator and painter
See also Thurmann (disambiguation) Klaus Thunemann (1937–2025), German bassoonist