Ronkainen is a Finnish surname. Notable people with the surname include:
Antti Ronkainen (born 1968), Finnish footballer Ilkka Ronkainen (born 1940s), Finnish/American organizational theorist Jari Ronkainen (born 1972), Finnish politician Mika Ronkainen (born 1970), Finnish film director Mikko Ronkainen (born 1978), Finnish freestyle skier Rauno Ronkainen (born 1964), Finnish TV and film cinematographer and cameraman Taneli Ronkainen (born 1995), Finnish ice hockey player