River Gee is a county in the southern portion of Liberia. One of 15 counties that constitute the first-level of administrative division in the nation, it has six districts. Fish Town serves as the capital with the area of the county measuring 5,113 square kilometres (1,974 sq mi) As of the 2008 Census, it had a population of 66,789, making it the third-least populous county in Liberia. It was created in 2000.

Tenth-largest in size, it is bordered by Sinoe County to the west, Grand Gedeh County to the north, and Grand Kru and Maryland counties to the south. The eastern part of River Gee borders the nation of Ivory Coast along the Cavalla River. The current County Superintendent is Daniel Johnson.