Claassen is an Afrikaans, Dutch and Low German patronymic surname. It may refer to:
Arthur Claassen (1859–1920), German orchestral conductor Ben Claassen III (born 1977), American comics artist and illustrator (born 1969), Dutch jazz singer George Claassen (born ca. 1950), South African writer, brother of Wynand J. G. Claassen (born 1991), South African golfer Johan Claassen (1929–2019), South African rugby player Neil Claassen (born 1992), South African rugby player Peter Walter Claassen (1886–1937), American entomologist Claasenia, a genus of stoneflies, Claassen's skolly, a butterfly René Claassen (born 1971), Dutch politician Ruben Claassen (born 1993), South African cricketer (born 1964), Dutch sculptor Utz Claassen (born 1963), German manager Wynand Claassen (born 1951), South African rugby player, brother of George
See also
Claassens
Claessen Claessens Clason Classen Classun Clausen Claussen Klaassen Klassen