San Patricio County, TX ZIP Codes & Directory
Complete postal guide for San Patricio County, Texas. Featuring the official county seat of Sinton, largest municipality Portland, and serving 2 incorporated municipal entities.
Municipalities Located in San Patricio County
Incorporated Cities, Towns, and Villages
Active USPS Postal Codes in San Patricio County
Standard delivery zones and geographic service boundaries
Frequently Asked Questions About San Patricio County, TX
What is the county seat and largest city in San Patricio County? ▾
The official county seat of San Patricio County is Sinton, and its largest incorporated municipality by population is Portland.
How many cities, towns, and villages are in San Patricio County? ▾
San Patricio County encompasses 2 incorporated municipal entities, including 2 cities, 0 towns, and 0 villages.
What is the total population and land area of San Patricio County? ▾
According to official U.S. Census Bureau data, San Patricio County has a population of approximately 66,768 residents and spans an area of 692 square miles.
How many postal codes operate in San Patricio County? ▾
There are 1 active USPS postal codes serving addresses within San Patricio County, Texas.