The Mursi (or Mun as they refer to themselves) are a Nilotic pastoralist ethnic group in Ethiopia. They principally reside in the Debub Omo Zone of the Southern Nations, Nationalities, and People's Region, close to the border with South Sudan. According to the 2007 national census, there are 7,500 Mursi, 448 of whom live in urban areas; of the total number, 92.25% live in the Southern Nations, Nationalities, and People's Region (SNNPR).
Surrounded by mountains between the Omo River and its tributary the Mago, the home of the Mursi is one of the most isolated regions of the country. Their neighbors include the Aari, the Banna, the Bodi, the Karo, the Kwegu, the Nyangatom and the Suri. They are grouped together with the Me'en and Suri by the Ethiopian government under the name Surma.
The Mursi speak the Mursi language as a mother tongue. It is classified as Surmic, which is a branch of the Nilo-Saharan language family. Mursi is closely related (over 80% cognate) to Me'en and Suri, as well as Kwegu. According to the 1994 national census, there were 3,163 people who were identified as Mursi in the SNNPR; 3,158 spoke Mursi as their first language, while 31 spoke it as their second language. According to the analytical volume of the 1994 national census, where Mursi was grouped under Me'en, 89.7% were monolingual, and the second languages spoken were Bench (4.2%), Amharic, the official language of Ethiopia (3.5%), and Kafa (1.1%).