The Sanni () were an ancient western Georgian tribe.
Sanni is also a Finnish common given name and family name. It may refer to:
Persons Given name Sanni Ahola (born 2000), Finnish ice hockey goaltender Sanni Kurkisuo (born 1993), Finnish singer, songwriter, and actress, better known by the mononym Sanni Sanni Leinonen (born 1989), Finnish alpine skier Sanni Utriainen (born 1991), Finnish javelin thrower
Last name Domingo Maria Sanni (18th century), Italian painter and architect of the late Baroque period, active in Spain Olayinka Sanni (born 1986), American professional basketball player
Various "Sanni", song by Finnish rock band Ripsipiirakka from their 2003 album Punkstars Sanni Yakuma, sometimes known as Daha ata sanniya, traditional Sinhalese exorcism ritual