Part of the East Welega Zone, Nunu Kumba is bordered on the southwest by the Didessa River which separates it from the Illubabor Zone, on the northwest by Jimma Arjo, on the north by Guto Wayu, on the northeast by Wama Bonaya, and on the southeast by the Wama which separates it from the Jimma Zone.
Rivers include the Negesso, Jawero, Sifa, Gindo and Jejeba.
A survey of the land in this woreda shows that 75.9% is arable or cultivable (32.4% under annual crops), 10.9% pasture, 4.9% forest, and the remaining 8.3% is considered swampy, mountainous or otherwise unusable.
Tobacco, niger seed and sesame are important cash crops.
Together with Amuru Jarte, Bila Seyo, Gida Kiremu, Ibantu, Jimma Arjo and Limmu, Nunu Kumba became the new home for a total of 22,462 heads of households and 112,310 total family members.