Oropom traditions recorded by Wilson capture the extent of their ancient territories: the whole Turkana to a point east of Lake Turkana which the Oropom called Malimalte, the Cherangani Hills eastward to Lake Baringo, much of the Trans-Nzoia District - all in present-day Kenya; Mt. Elgon and all of Teso sub-region in Uganda; as well as the areas of Didinga and Topossa in Sudan.