 The three largest ethnic groups reported in Berehna Aleltu were the Oromo (83.15%), the Amhara (14.04%), and the Werji (1.79%); all other ethnic groups made up 1.02% of the population.Oromiffa was spoken as a first language by 84.62%, and 14.98% spoke Amharic; the remaining 0.4% spoke all other primary languages reported.The majority of the inhabitants professed Ethiopian Orthodox Christianity, with 96.84% of the population reporting they practiced that belief, while 2.81% of the population said they were Muslim.