Teunissen is a Dutch patronymic surname meaning "son of Teunis", a nickname for Anthonius. People with this surname include:
Bert Teunissen (born 1959), Dutch photographer (born 1981), Dutch ice hockey player Christine Teunissen (born 1985), Dutch politician (1898–1975), Dutch film director Jo Teunissen-Waalboer (1919–1991), Dutch javelin thrower Mike Teunissen (born 1992), Dutch road cyclist and cyclo-cross racer Peter Teunissen (born 1957) Dutch geodesist
See also Teunissen-Cremers syndrome, a genetic disorder Theunissen (surname)