The 1994 national census reported a total population for this woreda of 35,769, of whom 17,934 were men and 17,835 women; 562 or 1.57% of its population were urban dwellers at the time. The two largest ethnic groups reported in Seweyna were the Oromo (89.44%), and the Somali (7.56%); all other ethnic groups made up 3% of the population.
The 1994 national census showed a total population of 35,769 for this woreda, with 17,934 men and 17,835 women; 562 or 1.57% were urban residents at the time. The two largest ethnic groups in Seweyna were Oromo (89.44%) and Somali (7.56%); all other ethnic groups made up 3% of the population.