Hämäläinen is a surname originating in Finland (in Finnish, it means "Tavastian"), where it is the sixth most common surname. It may also refer to, alphabetically:
Aatu Hämäläinen (born 1987), Finnish professional ice hockey playerAntony Hämäläinen (born 1980), Finnish musician and composer, now in the U.S.Brian Hamalainen (born 1989), Danish player of football (soccer)Eduard Hämäläinen (born 1969), Finnish decathleteElias Hämäläinen (born 1985), Finnish musician, winner of Finnish X Factor 2010Erik Hämäläinen (born 1965), Finnish player of ice hockeyHelvi Hämäläinen (1907–1998), Finnish authorJyrki Hämäläinen (1942–2008), Finnish magazine editor and biographerKalevi Hämäläinen (1932–2005), Finnish cross country skierKasper Hämäläinen (born 1986), Finnish footballerKyösti Hämäläinen (born 1945), Finnish rally driverNiko Hämäläinen (born 1997), Finnish-American FootballerPekka Hämäläinen (1938-2013), Finnish football player and administratorPekka Hämäläinen (born 1967), Finnish history professor at University of OxfordPentti Hämäläinen (1929–1984), Finnish bantamweight boxerRaimo Hämäläinen (born 1948), Finnish professor of mathematicsSirkka Hämäläinen (born 1939), Finnish economist, governor of the Bank of FinlandTapio Hämäläinen (1922–2008), Finnish actorVille Hämäläinen (born 1981), Finnish professional ice hockey player