sentences:  With an estimated area of 8,332.84 square kilometers, Sanja has an estimated population density of 17.3 people per square kilometer, which is less than the Zone average of 60.23.The 1994 national census reported a total population for this woreda of 105,751 in 20,428 households, of whom 54,405 were men and 51,346 women; 3,891 or 3.68% of its population were urban dwellers at the time.The two largest ethnic groups reported in Sanja were the Amhara (96.89%), and the Tigrayan (2.68%); all other ethnic groups made up 0.43% of the population.