Parcels, city limits, flood zones, transmission lines and census tracts for Duval County, Texas (county seat: San Diego), each from its official source and checked, with a map you can open in Felt. Parcel records as of March 2026, from the appraisal district.
Each source is the publisher's own service, checked on November 7, 2026. A source that stops answering drops off this page rather than staying as a dead link. Add any of them to a Felt map by URL.
| Data | Publisher | Checked | Updated | Service |
|---|---|---|---|---|
| Parcels | TxGIO StratMap, from Duval County's appraisal districtTax year 2026. Appraisal district boundaries: approximate, not a survey. | Live | March 2026 | Service URL ↗ |
| City limits | TxDOT City BoundariesEvery incorporated city in Texas; the layer on the live map. | Live | October 31, 2026 | Service URL ↗ |
| Flood zones | FEMA National Flood Hazard LayerThe authoritative layer, kept current by FEMA. | Live | Map Feb 4, 2011 | Service URL ↗ |
| Transmission lines | HIFLD Electric Power Transmission LinesA national snapshot: new lines and upgrades since then can be missing. | Live | September 5, 2023 | Service URL ↗ |
| Census tracts and income | Census Bureau ACS 2019–2023, via Esri Living AtlasOn 2020 census tract boundaries; older tract counts for the county will differ. | Live | 2019–2023 estimates | Service URL ↗ |
Property search, parcel maps and data downloads from the appraisal district; the county clerk's deed and plat records; the county and city GIS, floodplain and zoning resources a local search turns up; and the state's survey, oil and gas and soil maps. Each was opened on November 7, 2026. These are where parcel records, deeds, permits and zoning decisions come from.
Free, from the source. The Texas Geographic Information Office's statewide StratMap parcel layer carries Duval County's parcels from the county appraisal district, tax year 2026, collected in March 2026. The appraisal district's own property search and parcel map are listed under local sources above. TxGIO's DataHub also offers the county's parcels as a free shapefile download. Data resellers charge for copies of the same records. Add the layer to a Felt map by URL to filter, measure and share parcels with your team.
Only inside city limits. Texas counties have no general zoning power, so unincorporated land in Duval County is unzoned. Unzoned is not unregulated: Texas counties review subdivision plats and septic systems, and most permit development in the floodplain. Each city decides whether and how to zone. The city limits layer shows which city, if any, governs a site.
With the county clerk, not the appraisal district. Deeds, plats, easements and other real property records are recorded by the Duval County Clerk; the appraisal district's records and parcel maps are for property tax, and its boundaries are approximate, not a survey. The clerk's office is listed under local sources above. For a property's legal boundary, the recorded plat or a licensed surveyor's survey is the authority.
Rural Texas land is described by its original survey, abstract number, and block and section. The Railroad Commission's public GIS viewer maps survey lines with their abstract numbers across the state, along with oil and gas wells and pipelines, and offers the same layers as free county downloads. The General Land Office holds the original survey and land grant files, searchable by county and abstract number, and 317 historic maps of Duval County, from county maps to surveyors' working sketches. All are listed under local sources above.
3 cities and towns lie mostly inside Duval County: San Diego, Freer and Benavides. The Census Bureau's current boundaries for incorporated places map each one.
10.9% of Duval County's land and inland water lies in FEMA's Special Flood Hazard Area, the floodplain with a 1% chance of flooding in any year (zone A and its subtypes such as AE, plus V zones on the coast). The county's flood map (FIRM) took effect on February 4, 2011. Flood zones are a planning screen, not a determination: check the effective FIRM for a specific property. FEMA's Map Service Center →
HIFLD maps 34 miles of transmission line inside Duval County: 34 mi at 138 kV. The live map colours each line by voltage.
$50,081, against $76,292 for Texas (ACS 2019–2023 5-year estimates). Across its 3 census tracts (2020 boundaries), tract medians run from $42,978 to $61,935, and the middle tract sits at $57,159.
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