Regionally, parts of the county are within the extreme southernmost fringe of the regions locally known as Southeast Texas. Brazoria County is among a number of counties that are part of the region known as the Texas Coastal Bend. Its county seat is Angleton, and its largest city is Pearland. Brazoria County, like Brazos County farther upriver, takes its name from the Brazos River. It served as the first settlement area for Anglo-Texas, when the Old Three Hundred emigrated from the United States in 1821. The county also includes what was once Columbia and Velasco, Texas, early capital cities of the Republic of Texas. The highest point in Brazoria County is Shelton's Shack, located near the Dow Chemical Plant B Truck Control Center, measuring 342 ft above sea level.
Regionally, parts of the county are within the extreme southernmost fringe of the regions locally known as Southeast Texas. Brazoria County is among a number of counties that are part of the region known as the Texas Coastal Bend. Its county seat is Angleton, and its largest city is Pearland. Brazoria County, like Brazos County farther upriver, takes its name from the Brazos River. It served as the first settlement area for Anglo-Texas, when the Old Three Hundred emigrated from the United States in 1821. The county also includes what was once Columbia and Velasco, Texas, early capital cities of the Republic of Texas. The highest point in Brazoria County is Shelton's Shack, located near the Dow Chemical Plant B Truck Control Center, measuring 342 ft above sea level.