Leif Larsen (1906–1990) was a Norwegian sailor.
Leif Larsen may refer to 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 Olve Dolonen Larsen (born 1975), Norwegian athlete, NFL player and pro boxer