Addis Ababa is the capital and largest city of Ethiopia. In the 2007 census, the city's population was estimated to be 2,739,551 inhabitants. Addi…Addis Ababa is the capital and largest city of Ethiopia. In the 2007 census, the city's population was estimated to be 2,739,551 inhabitants. Addis Ababa is a highly developed and important cultural, artistic, financial and administrative center of Ethiopia. It is widely known as one of Africa's major capitals.