 The 1994 national census reported a total population for this woreda of 139,198, of whom 71,625 were men and 67,573 women; 3,930 or 2.82% of its population were urban dwellers at the time.The three largest ethnic groups reported in Guba Koricha were the Oromo (81.52%), the Amhara (11.86%) and the Argobba (6.16%); all other ethnic groups made up 0.46% of the population.Oromiffa was spoken as a first language by 80.49%, and 19.06% spoke Amharic; the remaining 0.45% spoke all other primary languages reported.