Texas · FIPS 48131 · County seat: San Diego
Duval County, TX GIS & Parcel Viewer
Looking for lot lines or a parcel number in Duval County, TX? The quickest route is the Duval 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 Duval County parcel map ↗
Opens gis.bisclient.com in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Duval County appraisal district map |
|---|---|
| Type | Appraisal district map (county level) |
| Website | gis.bisclient.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | San Diego |
| Population | 9,604 (2023 Census Bureau estimate) |
| Land area | 1,793 sq mi |
| FIPS code | 48131 |
Where the parcel data comes from
In Texas, property values are set by appraisal districts rather than by the county government, so this map comes from the appraisal district that serves Duval County. When we tested the link in October 2026 it opened with no login and no fee.
How to use the Duval 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.
If an address search comes up empty, try the parcel number from a tax bill or deed instead, or click the lot on the map.
Duval County by the numbers
Census Bureau figures put Duval County at about 9,604 people (2023 estimate) on roughly 1,793 square miles of land, which is about 5.4 residents per square mile. Among Texas's 254 counties, it is the 167th largest by population. Its county seat is San Diego.
Nearby parcel maps
Parcels close to the edge of Duval County can fall in the next county over. Neighboring counties:
- Brooks County
- Jim Hogg County
- Jim Wells County
- La Salle County
- Live Oak County
- McMullen County
- Webb County
Maps vs. surveys
Keep in mind that a GIS parcel layer is a tax map, not a survey. For exact boundaries, look at the recorded deed and plat or hire a licensed land surveyor.