Jimma Horo was a woreda in Oromia Region, Ethiopia. It was one of the 180 woredas in Oromia Region. Part of the East Welega Zone, Jimma Horo was bordered on the south by the East Shewa Zone, on the southwest by Bila Seyo, on the west by Abe Dongoro, on the northwest by Amuru Jarte, on the northeast by Abay Chomen, on the east by Guduru, and on the southeast by Jimma Rare. The administrative center of the woreda was Shambu; other towns included Harato and Sekela.
Jimma Horo was divided for Horo and Jimma Genete woredas and Shambu town.