The four largest ethnic groups reported in Adama were the Oromo (39.02%), the Amhara (34.53%), the Gurage (11.98%) and the Silte (5.02%); all other ethnic groups made up 9.45% of the population.
Этнический состав: оромо (39,02 %); амхара (34,53 %); гураге (11,98 %) и силте (5,02 %); оставшиеся 9,45 % представлены другими народностями.