Ahtisaari is a surname. It may refer to:
Eeva Ahtisaari (born 1936), Finnish teacher and historian, the First Lady of Finland from 1994 to 2000 Marko Ahtisaari (born 1969), Finnish technology entrepreneur and musician Martti Ahtisaari (1937–2023), Finnish politician, the tenth President of Finland (1994–2000)
See also
Ahtisaari Plan