San Patricio County is located in the U.S. state of Texas. As of the 2020 census, its population was 68,755. Its county seat is Sinton. San Patricio County is part of the Corpus Christi metropolitan statistical area.

Corpus Christi is a coastal city in the South Texas region of the U.S. state of Texas and the county seat and largest city of Nueces County with portions extending into Aransas, Kleberg, and San Patricio counties. It is 130 miles (210 km) southeast of San Antonio and 208 miles (335 km) southwest of Houston. Its political boundaries encompass Nueces Bay and Corpus Christi Bay. Its zoned boundaries include small land parcels or water inlets of three neighboring counties.