 With an estimated area of 423.6 square kilometers, Tulo has an estimated population density of 391.2 people per square kilometer, which is greater than the Zone average of 101.8.The 1994 national census reported a total population for this woreda of 117,273, of whom 59,927 were men and 57,346 women; 11,103 or 9.47% of its population were urban dwellers at the time.The two largest ethnic groups reported in Tulo were the Oromo (78.67%), and the Amhara (20.46%); all other ethnic groups made up 0.87% of the population.