Aaltonen is a Finnish surname, a Virtanen type analog of Aalto.^[1] Notable people with the surname include:

• Aimo Aaltonen (1906–1987), Finnish communist politician
• Ali Aaltonen (1884–1918), Lieutenant in the Imperial Russian army
• Anton Aaltonen (born 2003), Finnish footballer
• Arvo Aaltonen (1892–1949), Finnish swimmer
• Carina Aaltonen (born 1964), Finnish politician
• Emil Aaltonen (1869–1949), Finnish industrialist and philanthropist
• 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, Finnish World War II ace
• Leevi Aaltonen (born 2001), Finnish ice hockey player
• Mika Aaltonen (born 1965), former Finnish football (soccer) player
• Mikael Aaltonen (born 1991), Finnish ice hockey player
• Minna Aaltonen (born 1966), Finnish actress
• Miro Aaltonen (born 1993), Finnish ice hockey player
• Nico Aaltonen (born 1988), Finnish ice hockey player
• Paavo Aaltonen (1919–1962), Finnish gymnast
• Päivi Aaltonen (born 1952), Finnish female archer
• Patrick Aaltonen (born 1994), Finnish footballer
• Rauno Aaltonen (born 1938), Finnish former professional rally driver
• Remu Aaltonen (born 1948), Finnish member of the Hurriganes rock band
• Risto Aaltonen (1939–2021), 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