Part of the Southwest Shewa Zone, Amaya is bordered on the south by the Southern Nations, Nationalities and Peoples Region, on the west and north by West Shewa Zone, on the northeast by Wonchi, and on the east by Walisona Goro.
[2] Based on figures published by the Central Statistical Agency in 2005, this woreda has an estimated total population of 121,530, of whom 61,668 were males and 59,862 were females; 5,228 or 4.30% of its population are urban dwellers, which is less than the Zone average of 12.3%.
With an estimated area of 945.47 square kilometers, Amaya has an estimated population density of 128.5 people per square kilometer, which is less than the Zone average of 152.8.
The three largest ethnic groups reported in Amaya were the Oromo (85.4%), the Amhara (12.71%), and the Sebat Bet Gurage (0.93%); all other ethnic groups made up 0.96% of the population.
Oromiffa was spoken as a first language by 87.56%, 11.37% spoke Amharic, and 0.59% Sebat Bet Gurage; the remaining 0.48% spoke all other primary languages reported.