River Gee County is a county located in the southern part of the Republic of Liberia, one of fifteen that form the first level of administrative division of the country. The city of Fish is the capital city of the county. River Gee covers a total area of 5,113 km². In the 2008 Census the county had a population of 67,318 people, being the third least inhabited county in the country. It is the tenth largest county in size, which borders Sinoe County, to the west. With that of Grand Gedeh, to the north. And with Grand Kru and the county of Maryland, to the south.
The eastern part of River Gee borders the Republic of Côte d'Ivoire, along the lower section of the Cavalla River. Created in 2000, the current county superintendent is J. Karku Sampson.