| Official Name: | Arjo |
| Native Name: | አርጆ Arjoo |
| Settlement Type: | Village |
| Pushpin Map: | Ethiopia |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location in Ethiopia |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name: | Ethiopia |
| Subdivision Name1: | Oromia |
| Subdivision Type2: | Zone |
| Subdivision Name2: | Misraq Welega |
| Population As Of: | 2006 |
| Population Total: | under 1000 |
| Population Density Km2: | auto |
| Timezone: | EAT |
| Utc Offset: | +3 |
| Coordinates: | 8.8167°N 64°W |
| Elevation Footnotes: | [1] |
| Elevation M: | 2566 |
| Blank Name: | Climate |
Arjo (Amharic: አርጆ, Oromo: Arjoo, also spelled Argio) is a town in Ethiopia, located in Jimma Arjo woreda, in the Misraq Welega Zone of the Oromo Region. President Mulatu Teshome was born in Arjo.[2] Dr. Haile Fida, one of the pioneers in developing modern Afaan Oromo writing system (Qubee Afaan Oromo), was born in Arjo and attended his early education here.
Serving in the town from 1997 to 1997, Kate Collins Faber, a Peace Corps volunteer, described it as appearing to be "a fairly large village with clusters of tin-roofed houses lining the gravel road," but that in actuality the town was very small.[3]
In 2001 a pesticide dumpsite was said to exist in the town, containing DDT, Malathion, pirimiphos-methyl, and fenitrothion.[4] It was established in the early 1850s by a group of Macaa Oromo. Arjo was named by the name of its founder and the first Abba Gadaa governor. Odaa Arjo and Caffee Arjo are located at the south outskirt of the town.
The Comboni Missionary Sisters operate a kindergarten in the town.[5]