Biloxi, officially the City of Biloxi, is a city in Harrison County, Mississippi. Along with the adjoining city of Gulfport, Biloxi is a county seat of Harrison County. As a part of the Gulfport-Biloxi metropolitan area and the Gulfport-Biloxi-Pascagoula, Mississippi Combined Statistical Area, the beachfront of Biloxi lies directly on the Mississippi Sound, with barrier islands scattered off the coast and into the Gulf of Mexico. Keesler Air Force Base lies within the city and is home to the 81st Training Wing and the 403d Wing of the U.S. Air Force Reserve.