The 2007 national census reported a total population for this woreda of 77,156, of whom 39,486 were men and 37,670 were women; 7,853 or 10.18% of its population were urban dwellers. The majority of the inhabitants were Protestants, with 63.74% reporting that as their religion, while 26.52% observed Ethiopian Orthodox Christianity, and 8.84% observed Islam.[2]
Based on figures published by the Central Statistical Agency in 2005, this woreda has an estimated total population of 78,777, of whom 38,907 are men and 39,870 are women; 8,795 or 11.16% of its population are urban dwellers, which is greater than the Zone average of 10.9%. With an estimated area of 1,586.25 square kilometers, Anfillo has an estimated population density of 49.7 people per square kilometer, which is less than the Zone average of 91.7.[3]
The 1994 national census reported a total population for this woreda of 55,847 in 10,254 households, of whom 28,312 were men and 27,535 were women; 4,908 or 8.79% of its population were urban dwellers. The three largest ethnic groups reported in Anfillo were the Oromo (89.66%), the Amhara (4.6%), and the Mao people (4.46%) otherwise known as the Anfillo; all other ethnic groups made up 1.28% of the population. Oromiffa was spoken as a first language by 95.41%, 2.92% Amharic, and 0.64% speak Mao one of the northern group of Omotic languages; the remaining 1.03% spoke all other primary languages reported. The majority of the inhabitants observed Ethiopian Orthodox Christianity, with 58.47% reporting that as their religion, while 31.4% were Protestant, and 9.7% Muslim.[4]