Blog · October 14, 2026 · Texas
Dallam County Flood Zone Map in Texas
How to check whether a property in Dallam County sits in a FEMA flood zone, and what the answer means for a buyer near Dalhart.
Main page: Dallam County, TX GIS & Parcel Viewer (official map link, Dallam County facts and neighboring maps).
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Land along the creek bottoms near Kerrick and the flats outside Dalhart are where a Dallam County flood zone map lookup matters most. Here's how to read FEMA's map for a Dallam County, TX property and match it to the parcel record.
The sections below go from the FEMA search to the Dallam County parcel record, then cover insurance, permits and map changes near Coldwater.
How to use the Dallam County flood zone map
Open the FEMA Flood Map Service Center and type a county street address, say one in Coldwater. Search returns the effective FIRM panel for the spot in Dallam County, plus any pending changes FEMA has posted. For an interactive view of the county, FEMA's National Flood Hazard Layer viewer draws the zones over aerial imagery; zoom to the piece of ground near Texline and click. Then open the Dallam CAD interactive map for Dallam County to confirm the parcel near Coldwater. Match the Dallam County lines and acreage to the FEMA view, since flood maps do not draw property lines in detail.
Search Dallam County parcels by owner, address or ID
The county's own public map is the Dallam CAD interactive map, built on a BIS Consulting map viewer, and it opens without an account for parcels in Coldwater and the rest of the county. Search the county appraisal map by owner, address or property ID; the pop-up for a piece of ground near Coldwater lists the account and legal description. For a backup route to the map covering Texline, our Dallam County directory entry keeps the link current.
Where Dallam County land records are kept
The parcel layer for Dallam County points back to recorded deeds and plats, kept by the county's recording office (its title varies by state). Like every Texas county, Dallam County has its own appraisal district; it values property for all the local taxing units, while each unit sets its own rate. A deed book and page or instrument number on the county record is the fastest way to request the document for a lot in Texline.
Reading the zones on a Dallam County flood map
Any Dallam County parcel shaded as Zone A, AE, AH or AO sits in what FEMA calls a Special Flood Hazard Area, land with a 1-percent chance of flooding in any given year (the base or 100-year flood). Zone AE near Texline means FEMA published a base flood elevation; plain Zone A means no detailed elevation was studied. Shaded Zone X around Coldwater sits in the moderate band between the 100-year and 500-year floods. Unshaded X (or C) on the Dallam County panel means minimal risk.
Neighboring maps around Dallam County
Dallam County borders Union County, NM, Cimarron County, OK, Hartley County, Moore County, and Sherman County, and each keeps its own parcel map and records. Our Texas page links each map neighboring Dallam County.
Unmapped creeks in Dallam County
A low spot on a Dallam County tract outside any mapped zone, so treat an unmapped channel as a reason to ask questions, not proof the ground stays dry.
Flood insurance and building rules in Dallam County
Insurance is the practical stake for a Dallam County buyer. When a Dallam County home falls inside an A or V zone and secures a loan from a federally regulated or insured lender, a flood policy becomes a loan condition, as long as Dallam County or the town participates in the NFIP. In Zone X near Coldwater, insurance is a choice, not a mandate, although a lender in Texas can still ask for it. Where a structure near Coldwater looks higher than the shading suggests, the titleholder can ask FEMA for a Letter of Map Amendment (LOMA), supported by elevation data from a licensed surveyor. Adding on to a house near Texline inside the zone frequently requires a permit and an elevation check, and the building office serving Texline explains the steps.
Dallam County at a glance
Dalhart is the county seat, and Texline are among the other towns on the county map. Smaller places such as Coldwater, Conlen, and Kerrick appear on the county map as little clusters of lots. Dallam County had an estimated 7,237 people in 2023 (Census Bureau), spread across about 1,503 square miles. Outside Dalhart, most of the county map is farm, ranch or timber ground with large, irregular tracts.
Quick answers for Dallam County
My lot in Texline lists Zone AE. What does that mean?
For a Dallam County parcel, Zone AE means a Special Flood Hazard Area with a 1-percent annual chance of flooding and a published base flood elevation.
Is there a floodplain layer in the Dallam CAD interactive map?
Check the layer list in the Dallam CAD interactive map; if Dallam County includes a floodplain layer, confirm the zone on FEMA's map anyway.
Where do I get an elevation certificate in Dallam County?
Hire a licensed surveyor or engineer who works in Dallam County; ask the local floodplain office first in case one exists.
How do I challenge a flood zone for a lot in Texline?
For a lot in Texline, hire a surveyor for an elevation certificate, then file a LOMA request with FEMA.
How do I know if a property in Dallam County is in a flood zone?
Look it up at FEMA's Flood Map Service Center, then match the parcel lines in the Dallam CAD interactive map; for land near Dalhart, a zone starting with A or V is high risk.
Open the official Dallam County, TX parcel map Dallam 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.