Blog · October 14, 2026 · Texas
San Patricio County Flood Zone Map in Texas
FEMA's free flood maps and the San Patricio County parcel viewer, used together for property near Sinton.
Main page: San Patricio County, TX GIS & Parcel Viewer (official map link, San Patricio County facts and neighboring maps).
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The San Patricio County flood zone map question tends to arrive at a bad moment: a lender's letter, an insurance quote, or a permit counter in Ingleside. For any tract in San Patricio County, Texas, the answer affects insurance, permits and resale.
Next: FEMA's search tool, the zone labels you'll see for San Patricio County, and how the parcel record confirms which tract you're on.
How to check the San Patricio County flood zone map
Start at the FEMA Flood Map Service Center and enter the property address in Aransas Pass or anywhere else in the county. If a property near Gregory has no street number yet, search the nearest road and pan to it. For an interactive view of the county, FEMA's National Flood Hazard Layer viewer draws the zones over aerial imagery and reports the zone wherever you click near Aransas Pass. Switch to the San Patricio CAD interactive map and locate the same property near Gregory. Laying the county parcel outline beside the FEMA shading lists if a homesite near Gregory sits above or inside the zone.
Finding the tract on the San Patricio County map
The county's own public map is the San Patricio CAD interactive map, built on a BIS Consulting map viewer, and it opens without an account for parcels in Gregory and the rest of the county. Search the county appraisal map by owner, address or property ID; the pop-up for a property near Gregory lists the account and legal description. For a backup route to the map covering Aransas Pass, our San Patricio County directory entry keeps the link current.
San Patricio County land records
The parcel layer for San Patricio County points back to recorded deeds and plats, kept by the county's recording office (its title varies by state). Property values in San Patricio County come from its appraisal district, a separate political subdivision with its own board that sets one value per property for every local taxing unit. Easements and access rights near Ingleside live in recorded documents, so read the deed, not just the county map.
High, moderate and minimal risk in San Patricio County
On the FIRM covering San Patricio County, zones that start with A or V are Special Flood Hazard Areas, land with a 1-percent chance of flooding in any given year (the base or 100-year flood). Zone AE near Gregory means FEMA published a base flood elevation; plain Zone A means no detailed elevation was studied. Shaded Zone X around Aransas Pass sits in the moderate band between the 100-year and 500-year floods. Clear, unshaded X near Aransas Pass is outside the 500-year floodplain.
Unmapped creeks in San Patricio County
A creek near Gregory that lists no detailed zone, so treat an unmapped channel as a reason to ask questions, not proof the ground stays dry.
Neighboring maps around San Patricio County
A farm near the county line can carry separate records in Aransas County, Bee County, and Jim Wells County as well. Every map bordering San Patricio County is listed on our Texas directory.
Flood insurance and building rules in San Patricio County
Here's why the zone matters at a closing in Aransas Pass. Where a building in Aransas Pass falls inside an A or V zone and is financed by a regulated or federally insured lender, flood insurance is mandatory under the Flood Disaster Protection Act, wherever the community joins the NFIP. Outside the A zones around Gregory, federal rules don't require a policy, although a lender in Texas can still ask for it. If a building near Gregory sits above the flood line, FEMA's LOMA process allows a review, supported by elevation data from a professional surveyor. New construction in a San Patricio County Special Flood Hazard Area generally needs a floodplain permit; the San Patricio County floodplain administrator can say what applies.
Getting oriented in San Patricio County, TX
Town lots cluster around Sinton, the county seat, and Aransas Pass, Corpus Christi, Ingleside, and Portland. Smaller places such as Del Sol, Edgewater Estates, and Edroy appear on the San Patricio County map as little clusters of lots. Census Bureau estimates put San Patricio County at about 70,660 residents in 2023 on roughly 693 square miles of land. The San Patricio County map mixes subdivision lots near Gregory with farm and wooded tracts farther out. With a founding date of 1836, San Patricio County has long chains of title on some rural tracts.
San Patricio County flood zones questions
What does Zone AE mean on a San Patricio County flood map?
Yes, a property near Ingleside in Zone AE is high risk: a 1-percent-annual-chance floodplain where FEMA lists a base flood elevation.
My house near Ingleside is in Zone X. Is insurance required?
Not under federal rules; Zone X in San Patricio County is outside the Special Flood Hazard Area, although a lender can still require coverage.
Is there a floodplain layer in the San Patricio CAD interactive map?
Check the layer list in the San Patricio CAD interactive map; if San Patricio County includes a floodplain layer, confirm the zone on FEMA's map anyway.
Can a flood zone in San Patricio County be changed?
An owner near Ingleside can request a Letter of Map Amendment from FEMA with elevation data, generally from a professional surveyor.
Who prepares an elevation certificate for a house in Corpus Christi?
A professional surveyor or engineer prepares it, and the building office serving Corpus Christi may already have one on file for newer construction.
Open the official San Patricio County, TX parcel map San Patricio County in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.