Texas · FIPS 48409 · County seat: Sinton
San Patricio County, TX GIS & Parcel Viewer
Looking for lot lines or a parcel number in San Patricio County, TX? The quickest route is the San Patricio County appraisal district map, the county parcel map we keep on file for this county. We link straight to it and add a few tips for getting around.
Open the San Patricio County parcel map ↗
Opens gis.bisclient.com in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | San Patricio County appraisal district map |
|---|---|
| Type | Appraisal district map (county level) |
| Website | gis.bisclient.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Sinton |
| Population | 70,660 (2023 Census Bureau estimate) |
| Land area | 693 sq mi |
| FIPS code | 48409 |
Who runs this map
Texas splits the job: an appraisal district, not the county itself, values each property. This viewer belongs to the district covering San Patricio County. When we tested the link in October 2026 it opened with no login and no fee.
How to use the San Patricio County viewer
- Press the button above to open the appraisal district's map. Texas appraisal districts set taxable values, so their maps tie each parcel to a property account.
- Look up a property by its owner, situs address or property ID.
- Click any lot to see the account number and basic details.
- Follow the record link, when there is one, for values and exemptions.
Rural addresses don't always geocode well. When that happens, zoom in by hand and click the parcel, or search by owner name.
About San Patricio County
San Patricio County had an estimated 70,660 residents in 2023, according to the Census Bureau. With about 693 square miles of land, that works out to roughly 102 people per square mile. By population it ranks 53rd of 254 counties in Texas. Its county seat is Sinton.
Neighboring counties
Parcels close to the edge of San Patricio County can fall in the next county over. Neighboring counties:
Maps vs. surveys
The lines you see online are approximate. They're good for finding a lot and its parcel number, but a legal boundary question needs the recorded plat or a surveyor.