Gerritsen is a Dutch surname. Notable people with the surname include:
Annette Gerritsen (born 1985), Dutch speed skater
Lisa Gerritsen (born "Orszag" 1957), American actor and computer systems consultant/networking specialist
Maico Gerritsen (born 1986), Dutch footballer
Mees Gerritsen (born 1939), Dutch Olympic cyclist
Patrick Gerritsen (born 1987), Dutch footballer
Rinus Gerritsen (born 1946), Dutch bassist
Rupert Gerritsen (1953–2013), Australian historian
Tess Gerritsen (born 1953), American novelist
Wendy Gerritsen (born 1972), Dutch cricketer