Rensch is a German surname. Notable people with the surname include:
Bernhard Rensch (1900–1990), German evolutionary biologist and ornithologist Daniel Rensch (born 1985), American chess master Devyne Rensch (born 2003), Dutch footballer Katharina Rensch (born 1964), German gymnast René Rensch (born 1969), German rowing cox Ronald Rensch (1966–2021), German sailor Stanley Rensch (1940–2024), Surinamese human rights activist
See also Rensch's rule, biological rule on allometrics Rentsch, surname