The three largest ethnic groups reported in Humbo were the Welayta (96.33%), the Amhara (1.28%), and the Sidama (0.86%); all other ethnic groups made up 1.53% of the population.
In Humbo, the three most prevalent ethnicities were the Welayta (96.33%), followed by the Amhara (1.28%), and the Sidama (0.86%). The remaining ethnic groups accounted for 1.53% of the population.