Achi

• 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

• 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

• Rabinal Achí, a Mayan theatrical play
• Advanced Host Controller Interface (AHCI)