Blog · October 14, 2026 · Texas
Frio County Flood Zone Map, Texas: a practical guide
The zone on FEMA's map affects insurance, building and resale near North Pearsall.
Main page: Frio County, TX GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Weighing a property around Hilltop? Checking the Frio County flood zone map reveals whether it sits in a FEMA flood zone, and no account is needed. This Frio County guide covers: locating a parcel on FEMA's map, reading the zone codes, and confirming the outline on the county map.
Where the Frio County flood zone map lives
If you'd rather pan and zoom, open the National Flood Hazard Layer viewer, where zone shading sits over a photo base, for land near Derby included. Vacant ground around Dilley can still be found: search the nearest road and click inside the land.
Opening the official parcel viewer
Go first to the Frio County parcel viewer; it maps each assessed parcel around North Pearsall and Moore. Near Bigfoot, enter a street address, an owner's name or a parcel number, then pick the result to center the map on it. In and around North Pearsall, the record panel usually lists the owner of record, assessed acreage, a parcel ID and sometimes recent sales.
Decoding the flood zone labels
With a lot near Bigfoot, any A or V zone mark the Special Flood Hazard Area, which FEMA defines as a 1% annual chance of flooding. With a lot near Hilltop, a shaded X area marks moderate flood hazard, between the 1% and 0.2% annual chance floods; plain X, or C on older maps, is minimal risk.
Getting your bearings
Pearsall is the county seat, home to the main records offices. You'll also find Dilley, Bigfoot, Hilltop, and Moore, each with its own cluster of lots. Roughly 17,987 people live in Frio County (Census Bureau estimate, 2023) across roughly 1,134 square miles. Frio County was organized in 1871, and some chains of title near Bigfoot are long.
Land on the county line
Frio County meets Atascosa County, Dimmit County, La Salle County, Medina County, and Uvalde County, all with their own assessor records. A tract near the line by Dilley can show up in two county records, so check the neighboring map before you assume the acreage. With a lot near Derby, the Platbookmapper state page links each neighboring county map for Texas.
Low spots and local drainage
Low-lying fields near Moore may not have detailed mapping, so look for water marks and debris lines. Marshy spots near Bigfoot can limit building too; the National Wetlands Inventory mapper shows mapped wetlands.
Reading the legal description
Older tracts around Derby commonly use metes-and-bounds descriptions, listing bearings, distances and landmarks. Town lots near Derby are typically described by lot and block, making them easier to find. Write down the legal description for the tract near Derby for any title or survey request.
Field tips
Most viewers work in a phone browser, useful out on a road near Dilley, so load it before you lose signal. A printout of the tract near Moore is a good backup.
Where the recorded documents are
Before you sign anything, request the recorded deed from the County Clerk; the viewer just points to it, and that holds around Hilltop too. In and around Derby, have ready the book and page shown in the record panel to skip a name search.
Who handles what
For assessment questions about property around Bigfoot go to the appraisal district, the office behind the parcel record. Zoning, permits and septic questions near Derby need the planning or permitting office, town or county, depending on location.
Lining it up with the parcel map
Where a floodplain cuts across acreage near Pearsall, the location of the house or building pad decides a lot.
Insurance, lenders and building
For a structure inside an A or V zone and the loan is federally backed or regulated, flood insurance is generally required in communities in the NFIP, which applies near Pearsall as much as anywhere. Building or adding on near Bigfoot in a mapped zone often needs a floodplain permit; call the permitting office before you plan.
Questions to ask before you buy
Request whether the home has flooded for the house near Hilltop; an insurance quote early keeps the budget honest.
Before you lean on the lines
For acreage around Derby, acreage on the record is an assessed number; only a licensed surveyor sets the real lines on the ground. Records update in batches, so a fresh transfer around Pearsall might lag behind.
Frio County: common questions
How do I get a property removed from a flood zone around Derby?
Short answer: you can ask FEMA for a LOMA if surveyed elevations show the building near Derby is above the BFE, and lenders accept the result.
How can I tell if a house near North Pearsall is in a flood zone?
For most people, search the address near Dilley on FEMA's Flood Map Service Center; no account is needed.
What is a base flood elevation for land near Moore?
Short answer: a BFE near Dilley tells builders how high the lowest floor should be, and an Elevation Certificate compares the building to it.
What is the difference between Zone A and AE in Frio County?
Short answer: AE is a Special Flood Hazard Area with a published base flood elevation, so builders near Moore design to that elevation.
How is land described in Texas deeds near North Pearsall?
In and around North Pearsall, deeds use lot and block, metes and bounds or survey descriptions; copy it for any survey or title request.
Open the official Frio County, TX parcel map See it 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.