The six largest ethnic groups reported in Mao-Komo were the Oromo (52%), the Fadashi (21.4%), the Berta (12%), the Mao people (8%), the Kwama or Komo (5%) and the Gumuz (0.7%); all other ethnic groups made up 0.9% of the population.
In Mao-Komo, the six largest ethnic groups comprised 52% of the population, consisting of the Oromo (21.4%), Berta (12%), Mao people (8%), Kwama or Komo (5%), and Gumuz (0.7%), while the remaining percentage belonged to other ethnic groups.