Gedeb Asasa is one of the woredas in the Oromia Region of Ethiopia. Part of the Mirab Arsi Zone, Gedeb Asasa is bordered on the south by the Dodola, on the west by Kofele, on the north west by Kore, and on the north and east by Bekoji. The administrative center of the woreda is Asasa.
Ulrich Braukämper theorizes that the name "Gedeb" comes from a Hadiya subgroup mentioned in the Royal Chronicle of Zara Yaqob, where they are referred to as the "Gab". Braukämper has argued that the Hadiya kingdom prior to the Great Oromo migration in the 16th century included in this area, presenting a number of facts supporting his argument, as opposed to other experts who argue that it extended to the east.
The altitude of this woreda ranges from 2200 to 4180 meters above sea level; Mount Kaka is the highest point in the woreda. Melka Wakena Dam, its power station and its lake of 816 hectares are located in this woreda. A survey of the land in this woreda shows that 76.9% is arable or cultivable, 17.3% pasture, 0.4% forest, and the remaining 5.4% is considered swampy, mountainous or otherwise unusable. Garadela and Temela are the two state farms in this woreda. Linseed is an important cash crop.
Industry in the woreda includes two edible oil mills,four flour factory, one purified water factory, 22 grain mills and one brick factory employing 104 people, rock quarries, as well as 722 registered businesses which include 284 wholesalers, 216 retailers and 222 service providers. There were 25 Farmers Associations with 21,373 members and 4 Farmers Service Cooperatives with 4270 members. Gedeb has 46 kilometers of dry-weather and 78 of all-weather road, for an average of road density of 108.8 kilometers per 1000 square kilometers. About 42.5% of the total population has access to drinking water.