Gerretsen, Gerrets and Gerretse are Dutch patronymic surnames. Notable people with this name include:
- Boris Gerrets (1948–2020), Dutch-born film director
 - Chas Gerretsen (born 1943), Dutch photojournalist
 - John Gerretsen (born 1942), Canadian politician
 - Mark Gerretsen (born 1975), Canadian politician
 - Wolphert Gerretse van Kouwenhoven (1579–1662), Dutch settler in New Netherland known by his patronym Gerretse
 - Grace Gerretsen (born 1998)
 
See also
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