Ati
Ati or ATI may refer to:
- Ati people, a Negrito ethnic group in the Philippines
- Ati language (Philippines), the language spoken by this people group
- Ati-Atihan festival, an annual celebration held in the Philippines
- Ati language (China), an unclassified Loloish language of Huaning County, Yunnan, China
- Ati, a queen of the fabled Land of Punt in Africa
- Ati, Chad, a town in Chad
- Ati, Iran, a village in Khuzestan Province, Iran
- Maha Ati, one of the nine subdivisions of Buddhist Tantra in the Nyingma school
The acronym ATI may refer to: