Blog · October 17, 2026 · Texas
Gilmer Flood Zone Map, Texas: a practical guide
Flood zones are set by FEMA, and checking one near Warren City takes a few minutes.
Main page: Upshur County, TX GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Ahead of any purchase around Clarksville City, check the Gilmer flood zone map: the zone on that map shapes insurance, permits and resale. What this Gilmer guide covers: the free FEMA tools, what each zone label means, lender insurance rules and how to challenge a map that looks wrong.
Getting started with the Gilmer flood zone map
Flood zones come from FEMA's Flood Map Service Center: type an address near Union Grove, and choose the dynamic map. Vacant ground around Warren City can still be found: zoom in from the nearest road and click inside the land.
Opening the official parcel viewer
Go first to the Texas county CAD map; it includes each tax parcel around Warren City and Gladewater. Around Union Grove, enter a street address, an owner's name or a parcel number, and the matching parcel lights up. For acreage around Ore City, write down the parcel ID before closing the panel; each clerk in the county uses it to find the file.
Where Gilmer fits in
Gilmer lies within Upshur County, Texas, so its parcels are on the county's map. Gilmer is also the county seat, which puts the County Clerk close by. If you're looking near Clarksville City, City or town hall handles matters such as zoning, permits and utilities within town limits, while the county keeps the tax map. Acreage past the town limits toward Union Grove often follows county rules rather than the town's.
A short flood checklist
Ask the listing agent for any Elevation Certificate for the house near Ore City; an insurance quote early avoids surprises.
Getting your bearings
Gilmer is the county seat, which is where the courthouse records live. You'll also find Union Grove, East Mountain, Warren City, and Gladewater. Around 43,281 people call Upshur County home (Census Bureau estimate, 2023) on roughly 583 square miles. Upshur County was organized in 1846, which matters when you trace an old farm's title.
Getting answers from the right desk
For assessment questions about property around East Mountain are handled by the appraisal district, since that office keeps the assessment data. Questions about what you can build around Gladewater need the planning or permitting office, depending on whether the land is inside town limits.
Zones on the Gilmer flood zone map
If the land is near Warren City, any A or V zone are Special Flood Hazard Areas, land with a 1-percent chance of flooding in any year. If you're looking near Clarksville City, a shaded X area is moderate risk, roughly the 100- to 500-year range; unshaded X means minimal mapped risk.
Deeds, plats and who keeps them
For anything that matters, pull the recorded deed from the County Clerk; the parcel map near Ore City only summarizes it. For a tract near Gladewater, have ready the instrument number shown in the record panel to skip a name search.
Matching the zone to the lot lines
FEMA's map shows zones but not ownership, so check the Texas county CAD map too for the outline of the tract near East Mountain.
Insurance, lenders and building
For a parcel near Union Grove, an Elevation Certificate from a surveyor helps: it can change the insurance price a lot. Building or adding on near East Mountain in a mapped zone can trigger elevation rules; ask the local floodplain administrator early.
A word on accuracy
Parcel lines are drawn for taxes, not measured on the ground, so a fence near Ore City can sit a few yards off the line on screen. Closer to Clarksville City, owner names and values update on a schedule, so a deed recorded last month may not show yet.
Low spots and local drainage
Low-lying fields near Ore City may not have detailed mapping, so ask neighbors about past flooding. Wetlands near Clarksville City can limit building even outside a flood zone; the National Wetlands Inventory mapper shows mapped wetlands.
Sections, lots and bearings
Older tracts around Warren City are often described by metes and bounds, listing bearings, distances and landmarks. Subdivision lots in Gladewater usually use lot and block from a recorded plat instead, making them easier to find. Copy the legal description from the record for the parcel near Warren City for any title or survey request.
Gilmer: common questions
What is a base flood elevation near Ore City?
For most people, a BFE near Clarksville City tells builders how high the lowest floor should be; surveyors near Ore City use it often.
Is AE a high-risk flood zone near Warren City?
In most cases, both are high-risk zones, but only AE has a base flood elevation, so builders near Clarksville City design to that elevation.
What if the flood map is wrong for my lot near East Mountain?
For most people, you can ask FEMA for a LOMA if surveyed elevations show the building near Union Grove is above the BFE; it starts with an elevation survey.
When is flood insurance required around Clarksville City?
Short answer: for a building near East Mountain in an A or V zone with a federally backed or regulated mortgage, it's generally required, in communities that take part in the NFIP.
Why don't the lines match my fence near Ore City?
No; boundary questions near Union Grove need a licensed surveyor.
Open the official Upshur 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.