Blog · October 14, 2026 · Texas
Starr County Flood Zone Map (Texas)
Look up any Starr County address on FEMA's flood map, read the zone, and match it to the parcel record for land around La Grulla.
Main page: Starr County, TX GIS & Parcel Viewer (official map link, Starr County facts and neighboring maps).
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The Starr County flood zone map question tends to arrive at a bad moment: a lender's letter, an insurance quote, or a permit counter in Roma. FEMA's free Flood Map Service Center and the Starr County parcel viewer answer it together.
We'll cover finding a Starr County address on FEMA's map, what Zone A, AE and X mean, how the county viewer fits in, and what to do if the map looks wrong.
Where to see the official Starr County flood zone map
The authoritative source for a Starr County flood zone map is FEMA, so begin at the FEMA Flood Map Service Center. The site returns the effective Flood Insurance Rate Map (FIRM) panel covering that Roma location, which you can view or download. On acreage outside Roma, try FEMA's National Flood Hazard Layer viewer, so you can see whether the shading reaches a house near Rio Grande City. Then open the Starr County parcel viewer for Starr County to confirm the parcel near Roma. If the Starr County viewer has a floodplain layer, treat it as a convenience copy and confirm on FEMA's map.
Finding the tract on the Starr County map
Starr County publishes its parcels on the Starr County parcel viewer, free to use for a lot in Escobares or a tract near La Grulla. Most people find their Starr County tract fastest by searching an address in La Grulla, then clicking the outline. Bookmark our Starr County page too; it tracks the official Texas link if it moves and lists the maps around Escobares.
High, moderate and minimal risk in Starr County
For a lot in Roma, the label matters more than the color: A and V zones are Special Flood Hazard Areas, meaning FEMA estimates a 1-percent annual chance of flooding. Zone AE near Rio Grande City means FEMA published a base flood elevation; plain Zone A means no detailed elevation was studied. Land near Rio Grande City in shaded X (Zone B on older maps) sits in the moderate band between the 100-year and 500-year floods. Unshaded X (or C) on the Starr County panel means minimal risk.
Low ground and small streams around Roma
Small streams and ditches near Roma may not be studied in detail, so treat an unmapped channel as a reason to ask questions, not proof the ground stays dry.
Seller questions about flood history
Request any past flood claims history for a Starr County property before closing; it tells you more than the map alone. An agent working in Starr County can quote flood coverage once you know the zone for the lot near Rio Grande City.
Map dates and floodways in Starr County
When FEMA restudies streams in the county, preliminary maps are posted before they take effect, and a lot near Santa Elena can move in or out of a zone. Floodways, shown as hatched areas on some panels, are the channel and nearby land that must stay open, and building there near Rio Grande City faces the strictest rules.
Flood insurance and building rules in Starr County
The zone lists up again when a loan on a house near Rio Grande City is underwritten. If a barn or house outside Roma sits in a Special Flood Hazard Area and is financed by a regulated or federally insured lender, the lender must require flood coverage, provided the community near Roma takes part in the National Flood Insurance Program. For a Starr County home in shaded or unshaded X, federal rules don't require a policy, though a lender in Texas can still ask for it. If a building near Rio Grande City sits above the flood line, the titleholder can ask FEMA for a Letter of Map Amendment (LOMA), most often backed by an elevation certificate from a surveyor who works in the county. New construction in a Starr County Special Flood Hazard Area often requires a permit and an elevation check; the Starr County floodplain administrator can say what applies.
Quick answers for Starr County
Does a 100-year floodplain near Rio Grande City flood only once a century?
Not at all; a Starr County tract in that zone faces a 1-percent annual chance, so floods can come in back-to-back years.
Where do I get an elevation certificate in Starr County?
Hire a licensed land surveyor or engineer who works in Starr County; ask the local floodplain office first in case one exists.
Is there a floodplain layer in the Starr County parcel viewer?
Check the layer list in the Starr County parcel viewer; if Starr County includes a floodplain layer, confirm the zone on FEMA's map anyway.
Do I need flood insurance in Zone X in Starr County?
For a Zone X house near Rio Grande City, federal rules don't require flood insurance; buying it is still a choice worth pricing.
Can I build in a flood zone in Starr County?
Building in a Special Flood Hazard Area near La Grulla most often needs a floodplain permit and may require elevating the structure, so check with the county floodplain administrator.
Open the official Starr County, TX parcel map Starr 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.