Brownsvilleis thecounty seatofCameron County, Texas. It is thesixteenth most populouscity in thestateofTexas, with a population at the2010 censusof 175,023[3]and an estimated population in 2014 of 183,046.[4]It is located at the southernmost tip of Texas, on the northern bank of theRio Grande, directly north and across the border fromMatamoros, Tamaulipas,Mexico.