Sinn refers to the German word Sinn (sense), frequently contrasted with Bedeutung (indication, reference) in discussions of meaning.

Sinn may also refer to:

Sinn (river), a river in Germany

Sinn, Hesse, a community in Germany

Sinn (watchmaker), a German watchmaker

Sinn (comics), a character from the Spawn comics

Sinn, a character on the animated television series Frisky Dingo

Nickname of the professional wrestler Nick Cvjetkovich

Sinn Sisamouth, a Khmer singer and songwriter in the 1950s to the 1970s