The 1994 national census reported a total population for this woreda of 109,148, of whom 54,085 were men and 55,061 women; 4,059 or 3.72% of its population were urban dwellers at the time. The two largest ethnic groups reported in Guduru were the Oromo (96.17%), and the Amhara (3.71%); all other ethnic groups made up 0.12% of the population.
The 1994 national census indicated a total population of 109,148 in this woreda, including 54,085 men and 55,061 women; 3.72%, or 4,059 people, were urban residents at the time. The two most populous ethnic groups in Guduru were Oromo (96.17%) and Amhara (3.71%); all other ethnic groups made up a small percentage of the population.