Franssen is a Dutch patronymic surname meaning "son of Frans". It can refer to:
Everhardt Franßen (born 1937), German judge Jan Franssen (born 1951), Dutch politician Jo Franssen (1909–1995), Dutch politician MHH Franssen (1903–1981), Dutch lawyer Margot Franssen (born 1952), Dutch-born Canadian philanthropist, activist and entrepreneur Nico Valentinus Franssen (1932–1993), Dutch-born American physicist and inventor Franssen effect, an auditory illusion discovered by him Franssens Joep Franssens (born 1955), Dutch composer
See also Fransen, Dutch surname