The Mursi (or Mun as they refer to themselves) are a Nilotic pastoralist ethnic group that inhabits southwestern 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 Kara, 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.