 The two largest ethnic groups reported in Chiro were the Oromo (86.25%), and the Amhara (12.69%); all other ethnic groups made up 1.06% of the population.Oromiffa was spoken as a first language by 85.23%, and 14.3% spoke Amharic; the remaining 0.47% spoke all other primary languages reported.The majority of the inhabitants were Moslem, with 82.01% of the population reporting they practiced that belief, while 17.37% of the population said they professed Ethiopian Orthodox Christianity.