Mongolia is divided into 21 aymags or provinces. Aimaq (also spelled aimag, and aimak) is the Mongolian word for prefecture. Because Mongolia was a province of China though, it was divided into aimaqs (prefectures of the province of Outer Mongolia). Ths system was continued with even when independence was gained.

See ISO 3166-2:MN for their ISO 3166-2 codes.

List of aymags

(capitals in parentheses):

• Arhangay (Tsetserleg)
• Bayan-Ölgiy (Ölgiy)
• Bayanhongor (Bayanhongor)
• Bulgan (Bulgan)
• Darhan-Uul (Darhan)
• Dornod (Choybalsan)
• Dornogovĭ (Saynshand)
• Dundgovĭ (Mandalgovĭ)
• Govĭ-Altay (Altay)
• Govĭsümber (Choyr)
• Hentiy (Öndörhaan)
• Hovd (Hovd)
• Hövsgöl (Mörön)
• Ömnögovĭ (Dalanzadgad)
• Orhon (Erdenet)
• Övörhangay (Arvayheer)
• Selenge (Sühbaatar)
• Sühbaatar (Baruun-Urt)
• Töv (Zuunmod)
• Uvs (Ulaangom)
• Zavhan (Uliastay)

Additionally, the capital, Ulaanbaatar, ranks as a municipality.

is:Listi yfir mongólsk Aimag he:מחוזות מונגוליה