Karttunen is a Finnish surname. Notable people with the surname include:
- Anssi Karttunen (born 1960), Finnish classical cellist
- Frances Karttunen (born 1942), American linguist, historian and writer
- Hanna Karttunen, Finnish dancer
- Lauri Karttunen (1941–2022), American linguist
- Mika Karttunen (born 1981), Finnish chess player
- Ossi Karttunen (born 1948), Finnish sprinter
See also
- 3758 Karttunen, a main-belt asteroid
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