Grand Gedeh is a county in the eastern portion of the West African nation of Liberia. One of 15 counties that comprise the first-level of administrative division in the nation, it has three districts. Zwedru (formerly Tchien) serves as the capital with the area of the county measuring . As of the 2008 Census, it had a population of 126,146, making it the ninth most populous county in Liberia.
Grand Gedeh's County Superintendent is Christopher Beh Bailey. The county is bordered by Nimba County to the west, Sinoe County to the southwest, and River Gee County to the southeast. The northern part of Grand Gedeh borders the nation of Côte d'Ivoire.