Koskinen is a surname originating in Finland (in Finnish, it means "small rapids"), where it is the ninth most common surname. Notable people with the surname include:
Aarno Yrjö-Koskinen (1885–1951), Finnish politician, ambassador and freiherrHarri Koskinen (born 1970), Finnish designerJari Koskinen (born 1960), Finnish politician, Minister for Agriculture and Forestry of FinlandJohannes Koskinen (born 1954), Finnish politician (M.P., Minister of Justice)John Koskinen, US IRS commissioner December 23, 2013 to date, and former president of the U.S. Soccer Foundation (2004–2008)Joonas Koskinen, Finnish ice hockey playerJukka Koskinen, Finnish musician (bassist for Norther, Wintersun)Jukka Koskinen (footballer) (born 1972), Finnish football (soccer) playerKalle Koskinen (born 1972), Finnish ice hockey playerKerkko Koskinen (born 1973), Finnish musicianLennart Koskinen (born 1944), clergyman in the Church of Sweden, serving as bishop in VisbyMikko Koskinen (born 1988), Finnish hockey player for the Sound Tigers in AHL leaguePasi Koskinen (born 1972), Finnish vocalist (Amorphis)Petri Koskinen (born 1983), Finnish ice hockey playerRolf Koskinen (born 1939), Finnish orienteering competitor, European championSampo Koskinen (born 1979), Finnish football (soccer) playerSauli Koskinen (born 1985), a Finnish TV/radio personality and entertainment reporterTapio Koskinen (born 1953), Finnish ice hockey playerYrjö Sakari Yrjö-Koskinen (1830–1903), Finnish politician (senator, Finnish Party), professor, historian