Brownsville is a city in Cameron County in the U.S. state of Texas. It is located on the western Gulf Coast in South Texas, adjacent to the border with Matamoros, Mexico. The city covers 81.528 square miles (211.157 km2) and has a population of 183,299 as of 2017. It is the 131st-largest city in the United States and 16th-largest in Texas. It is part of the Brownsville–Matamoros conurbation, The city is known for its year-round subtropical climate, deep-water seaport and Hispanic culture.