Hans Nielsen may refer to:
- Hans Nielsen (composer) (c.1580-c.1626) Danish madrigal composer at the court of Christian IV
- Hans Nielsen (actor) (1911-1965), German actor
- Hans Nielsen (boxer), Hans Jacob Nielsen (1899-1967) featherweight who competed in the 1920s
- Hans Christian Nielsen, Danish football (soccer) player
- Hans Nielsen (speedway rider), Danish speedway racer