Brownsville is a town in Cameron County in the Texas state of the United States. It is situated in southern Texas on the western Gulf Coast, close to the Matamoros, Mexico border. The town covers 81,528 square miles, and as of 2018 has a population of 183,392. It is the United States '131st-largest city, and Texas' 16th-largest. This is a member of the conurbation of Brownsville ? Matamoros. The town is known for its subtropical climate, deep-water seaport and Hispanic culture throughout the year.