This woreda covers part of the homeland of the Welayta people.
Based on figures published by the Central Statistical Agency in 2005, this woreda has an estimated total population of 158,084, of whom 79,562 were males and 78,522 were females; 5,309 or 3.36% of its population are urban dwellers, which is less than the Zone average of 8.5%. With an estimated area of 588.13 square kilometers, Offa has an estimated population density of 268.8 people per square kilometer, which is greater than the Zone average of 156.5.