The 1994 national census reported a total population for this district of 111,926, of whom 55,969 were men and 55,957 women; 31,869 or 28.47% of its population were urban dwellers at the time. The five largest ethnic groups reported in Adama were the Oromo (78.69%), the Amhara (8.53%), the Soddo Gurage (2.87%), the Silt'e (2.81%), and the Sebat Bet Gurage (1.19%); all other ethnic groups made up 5.81% of the population.
According to the 1994 national census, Adama district had a total population of 111,926 people, with 55,969 men and 55,957 women; approximately 28.47% of its residents lived in urban areas at that time. The largest ethnic groups found in Adama were the Oromo (78.69%), Amhara (8.53%), Soddo Gurage (2.87%), Silt'e (2.81%), and Sebat Bet Gurage (1.19%), while other ethnic groups made up 5.81% of the population.