Achi

Achi may refer to:
 * Achi language, a Mayan language
 * Achi people, a Maya people in Guatemala

In places:
 * Achí, Bolívar a municipality in Colombia
 * Achi, Nagano, a village in Japan
 * Achi, Jalal-Abad, a village in Kyrgyzstan
 * Achi (Nigeria), a town in Enugu State, Nigeria
 * Achi, Ozurgeti Municipality, a village in Georgia
 * Achi Monastery, a medieval church near the village

In other uses:
 * Achi (game), an abstract strategy game
 * Australasian College of Health Informatics, a professional organisation
 * Australian Classification of Health Interventions, the system used to code inpatient episodes of care in Australian hospitals
 * Achi, flour produced from the seeds of Brachystegia eurycoma

People with the name

 * Astrid Achi (1961–2023), Ecuadorian operatic soprano
 * William Charles Achi (1858–1928), Hawaiian lawyer and politician
 * William Charles Achi, Jr. (1889–1947), Hawaiian attorney and territorial judge
 * Achi Brandt (born 1938), Israeli mathematician