Bryan is a city in Brazos County, Texas, United States. As of the 2010 census, the city had a population of 76,201. As of May 2017, the estimated population was 84,637. It is the county seat of Brazos County and is located in the heart of the Brazos Valley. It borders the city of College Station, which lies to its south. Together they are referred to as the Bryan?College Station metropolitan area, which has a population of more than 250,000.