The 1994 national census reported a total population for this woreda of 119,499, of whom 59,757 were men and 59,742 women; 6,301 or 5.27% of its population were urban dwellers at the time. The two largest ethnic groups reported in Gaserana Gololcha were the Oromo (91.36%), and the Amhara (8.18%); all other ethnic groups made up 0.46% of the population. Oromiffa was spoken as a first language by 88.36%, and 9.29% spoke Amharic; the remaining 2.35% spoke all other primary languages reported. The majority of the inhabitants were Muslim, with 69.79% of the population having reported they practiced that belief, while 30.02% of the population said they professed Ethiopian Orthodox Christianity.