Lassen is a Danish patronymic surname meaning "son of Lars", and thus a parallel form of the more common surname Larsen. Notable people with the surname include:Anders Lassen (1920-1945), a Danish recipient of the British Victoria Cross Christian Lassen, a Norwegian-German orientalist Clyde Everett Lassen, a United States Navy aviator and Medal of Honor recipient Eduard Lassen, a Belgian composer Erik Sætter-Lassen (1892–1966), a Danish sport shooter Frederik Lassen, a Danish football player Georg Lassen, a German former U-boat captain Hans Christian Lassen, a Danish sprint canoer Hartvig Lassen (1824–1897), a Norwegian editor and literary historian Henrik Andreas Zetlitz Lassen, a Norwegian politician Inger Lassen (1911–1957), a Danish film actress Jean Elisabeth Lassen, a Canadian weightlifter Justin Lassen, an American composer, producer, multi-instrumentalist and remixer Leigh Lassen, an American actress Leo Lassen (1899–1975),an American baseball announcer Niels A. Lassen (1926-1997), a Danish medical researcher Peter Lassen, a Danish-American rancher, prospector and explorer Peter Lassen (footballer), a Danish former football striker Werner Lassen, a Namibian amateur golfer
