Jenssen is a Norwegian patronymic surname meaning "son of Jens". The prefix "Jens-" is a Danish and Frisian derivative of Johannes. There are alternate spellings, including the Danish Jensen, the English language Jenson, and the Belgian/Dutch language Janson. Jenssen is uncommon as a given name. People with the name Jenssen include:
Amanda Jenssen (born 1988), Swedish singerElois Jenssen (1922-2004), American film and television costume designerGeir Jenssen, Norwegian musician best known under the recording name BiosphereHans Jørgen Darre-Jenssen (1864-1950), Norwegian politicianHans Wiers-Jenssen (1866–1925), Norwegian novelistJens Martin Arctander Jenssen (1885-1968), Norwegian politicianJens Peter Book-Jenssen (1910–1999), Norwegian singerJohan Henrik Wiers-Jenssen (1897–1951), Norwegian newspaper columnistLauritz Jenssen (1837–1899), Norwegian businessperson and politicianLauritz Dorenfeldt Jenssen (1801–1859), Norwegian businesspersonLeif Jenssen, Norwegian weightlifterLene Jenssen, Norwegian swimmerMatz Jenssen (1760–1813), Norwegian businesspersonRuben Yttergård Jenssen, Norwegian footballerWorm Hirsch Darre-Jenssen (1870-1945), Norwegian politician