The 2007 national census reported a total population of 248,173, of whom 124,289 were men and 123,884 were women. 12,215 or 4.92% of its population were urban dwellers. With an estimated area of 1,602.66 square kilometers, Omo Nada has an estimated population density of 158.7 people per square kilometer, which is greater than the Zone average of 150.6. The majority of the inhabitants were
Muslim, with 95.44% of the population reporting they observed this belief, while 2.93% of the population said they practiced
Ethiopian Orthodox Christianity, and 1.49% were
Protestant. To contrast, the 1994 national census reported a total population for this district of 182,995, of whom 91,662 were men and 91,333 women; 7,249 or 3.96% of its population were urban dwellers at the time. The five largest ethnic groups reported in Omo Nada were the
Oromo (91.2%), the
Yem (3.07%), the
Amhara (1.65%), the
Hadiya (1.32%), and the
Kullo (1.1%); all other ethnic groups made up 1.66% of the population. However according to one source, in the early 1990s 72,200 members of the Yem lived in 26 villages in this district.
Oromiffa was spoken as a first language by 94.16%, 2.17% spoke
Amharic, 1.28% spoke
Hadiya, and 1.28% spoke
Kullo; the remaining 1.11% spoke all other primary languages reported. The majority of the inhabitants were
Muslim, with 95.64% of the population having reported they practiced that belief, while 3.24% of the population said they professed
Ethiopian Orthodox Christianity, and 1.06% were
Protestant. ==Climate==