| Dader | |
| Native Name Lang: | om |
| Settlement Type: | Town |
| Pushpin Map: | Ethiopia |
| Coordinates: | 9.3167°N 68°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Ethiopia |
| Subdivision Type1: | Region |
| Subdivision Type2: | Zone |
| Subdivision Name2: | East Hararghe Zone |
| Subdivision Type3: | Woreda |
| Subdivision Name3: | Dadar |
| Population Total: | 13,710 |
| Population As Of: | 2005 |
| Blank Name: | Climate |
| Blank Info: | Cwb |
Dader (Amharic: ደደር) is a town located in the East Hararghe Zone of the Oromia, Ethiopia with an altitude of above sea level. It is the administrative center of the Dader District.
Between 1954 and 1967 Deder received telephone service. Records at the Nordic Africa Institute website provide details of several schools in the town during the year 1968. By 1957 a Mennonite mission had been established in the town, which included a school and a hospital.[1]
In the 1930s Deder was a center of coffee production, having a coffee market on the saddle between the Mounts Oubi and Miinya. The town was occupied by the Italians 21 July 1936.[1]
Based on figures from the Central Statistical Agency in 2005, Deder has an estimated total population of 13,710 of whom 6,592 are men and 7,118 are women.[2] The 1994 census reported this town had a total population of 7,675 of whom 3,575 were men and 4,100 were women.