| Official Name: | Koch County |
| Native Name: | Jagei |
| Settlement Type: | County |
| Pushpin Map: | South Sudan |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in South Sudan |
| Subdivision Type: | Country |
| Subdivision Name: | South Sudan |
| Subdivision Type1: | Region |
| Subdivision Name1: | Greater Upper Nile |
| Subdivision Type2: | State |
| Subdivision Name2: | Unity State |
| Unit Pref: | Imperial |
| Area Total Km2: | 4,417 |
| Population As Of: | 2017 estimate[1] |
| Population Total: | 112,040 |
| Population Density Km2: | auto |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Timezone: | CAT |
| Utc Offset: | +2 |
| Coordinates: | 8.596°N 29.992°W |
Koch County is an administrative division of Unity State in the Greater Upper Nile region of South Sudan, covering an area in the centre of the state.[2]
The administrative centre is the town of Koch.Large villages include Dhor Wang, Thorial, Duar, Wath-Thier and Bieh.[3] According to the Sudan Population and Housing Census, 2008, there were 75,000 persons in Koch County.The population is extremely poor, with widespread illiteracy.There are serious security concerns.[4]
Between April and November 2010, over 35 people died in the county, many of them civilians, from insurgent attacks.There were suspicions that General Gatluak Gai, who came from Koch County, was the leader of the forces responsible for these attacks.[5] As of January 2011 talks were in progress with different people who claimed to represent Gatluak Gai, but the situation was extremely obscure.[6] On 18 July 2011, Gatluak Gai concluded peace talks with the SPLA.Three days later he was killed.His second in command in the "South Sudan Liberation Army" rebel group, Marko Chuol Ruei, claimed responsibility for the death, saying Gatluak Gai had told his fighters to ignore the peace agreement.[7]