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
Joep Franssen (1899-1975), Dutch racing cyclist
M.H.H. 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
