Soininen is a Finnish surname. Notable people with the surname include: Heidi Soininen (born 1978), maiden name of Heidi Schauman, Finnish economist Heikki Soininen (1891–1957), Finnish farmer and politician Jani Soininen (born 1972), Finnish ski jumper Jaron Soininen, drummer of the South Australian band Universum Lauri Soininen (1875–1919), Finnish poet and journalist Michael Soininen, guitarist and vocalist of the South Australian band Universum Mikael Soininen (1860–1924), Finnish educationist and politician
Eliel Soisalon-Soininen (1856–1905), Finnish politician