Richmond is a city in the U.S. state of Texas and the seat of Fort Bend County, within the Houston–The Woodlands–Sugar Land metropolitan area. As of the 2010 U.S. census, the city population was 11,679.Even though it is the county seat, thus containing most of the local government offices, and the historic center of the area, it is actually one of the smaller cities in the area. Nearby Sugar Land is the largest city in the county.