Aaltonen is a surname originating in Finland (in Finnish, it means "small wave"). It may also refer to, alphabetically:
Ali Aaltonen (1884-1918), Lieutenant in the Imperial Russian army
Arvo Aaltonen (1892–1949), Finnish swimmer
Erkki Aaltonen (1910–1990), Finnish composer
Jani Aaltonen (born 1990), Finnish footballer
Juhamatti Aaltonen (born 1985), Finnish ice hockey player
Juhani Aaltonen (born 1935), Finnish jazz musician
Lasse Aaltonen, World War II ace
Mika Aaltonen (born 1965), former Finnish football (soccer) player
Mikael Aaltonen, Finnish ice hockey player
Minna Aaltonen (born 1966), Finnish actress
Nico Aaltonen, Finnish ice hockey player
Paavo Aaltonen (1919–1962), Finnish gymnast
Päivi Aaltonen (born 1952), Finnish female archer
Rauno Aaltonen (born 1938), Finnish former professional rally driver
Remu Aaltonen, Finnish member of the Hurriganes rock band
Risto Aaltonen (born 1939), Finnish actor
Timo Aaltonen (born 1969), Finnish shot putter
Uma Aaltonen (1940–2009), Finnish author, journalist and former MEP
Veikko Aaltonen (born 1955), Finnish director, editor, sound editor, production manager and film and television writer and actor
Wäinö Aaltonen (1894–1966), Finnish artist and sculptor
Yrjö Aaltonen (1916–1979), Finnish director of photography and actor
