Achomi people (Persian: اَچُمِنیان, Gulf Arabic: اتْشُم/اتْشَم/اچومیین, Pahlavi: 𐭠𐭰𐭬𐭭𐭩𐭠, Avestan: 𐬀𐬗𐬨𐬀𐬥𐬌𐬌𐬀), known by their self-designated pseudonym as Khodmooni (Persian: خُودمونی), commonly known as Laris (Farsi: لاری‌ها) or Larestanis (Persian: ‌لآرِستَانِی‌ها), are a Persian and Iranic group said to be descended mainly of Utians, and/or of a tribe of Persians known as "Ira" (Persian: ارا) according to Sasanian sources, who primarily inhabited southern Iran in a region historically known as Irahistan (presently Larestan region), some of them migrated to Shiraz, and the Arab countries in the Persian Gulf region. They speak the Achomi language which has reported eight dialects and it is unintelligible with New Persian/Farsi, (Dari, Tajiki, and Iranian). They are predominantly Sunni Muslims, with a Shia minority.

They are considered Persian or Perside/Persoid (Southwestern Iranic) in origin.

In the Achemaenid Behistun Inscription of Darius the Great, a land in Southern Persis called "Vautiya" or "Yautiya" is described. Leading scholars to believe that might they be the same as the homeland of the people Herodotus called "Utians".

According to later Sassanian sources, Irahistan was inhabited by an ancient Persian tribe known as "Ara" or "Ira" or "Irah" people, which are said to be a large tribe of Persians of Aryan origins.^{[additional citation(s) needed]}

Similarly to the House of Sasan, the later Lari-ruled Miladian dynasty which ruled Laristan during the Medieval Ages traced their origins to Gorgin Milad, a descendant of the cycle of the legendary Kay Khosrow of the Kayanian dynasty.

Their dance indicates at least a cultural connection to Bakhtiaris.

Author Mehran Kokherdi suggests that Achomis/Khodmoonis/Lari people mainly have their roots in Utians with possible Persian, Parthian, Jewish, Scythian, and Indian/Dravidian influences.^

According to local traditions, some Abbasid Khodmoonis claim an ancestral link to Ibn Abbas.^{[citation needed]}