Duar is a large village in Koch County, Unity State, South Sudan. It is on the main oil road leading south from Bentiu, and is close to the Thar Jath Central Processing Facility in the Block 5A oil concession.The village is in a Jagei Nuer region.A clinic operated by Médecins Sans Frontières was established in the village in 1989 by Dr. Jill Seaman to treat patients suffering from visceral leishmaniasis.