Leif Larsen (1906–1990) was a Norwegian sailor.
Leif Larsen may also refer to:
Leif Larsen (politician) (1898–1978), Norwegian politician, mayor of Bærum Leif Larsen (1903–1945), who later took the name Leif Larsen Tronstad, Norwegian chemist and resistance member Leif Larsen (cyclist) (born 1942), Danish cyclist Leif Holger Larsen (1954–2015), Norwegian diplomat Leif Larsen (American football) (born 1975), Norwegian athlete, NFL player and pro boxer