Niemi is a surname originating in
Finland (in
Finnish, it means "peninsula"). It may also refer to, alphabetically:
- Antti Niemi (footballer) (born 1972), Finnish football goalkeeper
- Antti Niemi (ice hockey) (born 1983), Finnish ice hockey goaltender
- Antti-Jussi Niemi (born 1977), Finnish ice hockey defenceman
- Erkki Niemi (born 1962), Finnish high jumper
- Esko Niemi (born 1934), Finnish ice hockey player
- Jari Niemi (born 1977), Finnish footballer
- Kai Niemi (born 1955), motorcycle speedway rider
- Laurie Niemi (1925–1968), American footballer
- Lisa Niemi (born 1956), Finnish-American actress and dancer
- Masa Niemi (1914–1960), Finnish actor
- Matti Niemi (rower) (born 1937), Finnish rower
- Matti Niemi (athlete) (born 1976), Finnish hurdler
- Mikael Niemi (born 1959), Swedish author
- Mikko Niemi (born 1985), Finnish basketball player
- Mikko Niemi (born 1972), Finnish ice hockey player
- Pekka Niemi (1909–1993), Finnish cross-country skier
- Shane Niemi (born 1978), Canadian sprints athlete
- Virpi Niemi (born 1966), Finnish cross country skier
