Grand Gedeh is a county in the eastern portion 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 10,484 square kilometres (4,048 sq mi). As of the 2008 Census, it had a population of 126,146, making it the ninth most populous county in Liberia.

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.

In the 1984 Census, the county had a population of 63,028 people. With a Provisional Census 2008 population of 126,146, the county has grown by 2.9% annually, the second highest among the counties of Liberia.The county is home to a large Muslim population along with residents of the Ivory Coast.

Grand Gedeh County Superintendent Hon. Christopher Beh Bailey.