Sea lion can refer to:
- Sea Lion, an animal
- Operation Sealion, the planned German invasion of Great Britain during World War II
- Sea Lion, in heraldry, a monster consisting of the head and front limbs of a lion with the tail of a fish
- Sea Lion is the pseudonym for fiction of the naval author Geoffrey Bennett
- Sea Lion Woman, a traditional southern U.S. song originally recorded by Christine and Katherine Shipp
- See Line Woman, a signature song by Nina Simone about an upper class prostitute, from the album Broadway-Blues-Ballads (1964), often mispronounced as Sealion Woman.
