Blog · October 14, 2026 · Wyoming
The Weston County Flood Zone Map: a Wyoming guide
How to check if a property in Weston County sits in a FEMA flood zone, and what the answer means for a buyer near Upton.
Main page: Weston County, WY GIS & Parcel Viewer (official map link, Weston County facts and neighboring maps).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Is that lot in Upton in a flood zone? The Weston County flood zone map answer comes from FEMA, and it's free to look up. FEMA's free Flood Map Service Center and the Weston County parcel viewer answer it together.
Below are the FEMA links, a plain reading of the zone labels, notes on where water shapes land around Upton, and short answers to common questions.
Where to see the official Weston County flood zone map
FEMA's official flood maps for Weston County are free at the FEMA Flood Map Service Center. If a tract near Upton has no street number yet, search the nearest road and pan to it. For an irregular lot near Upton, the National Flood Hazard Layer viewer is easier to use, so you can see if the shading reaches a house near Upton. Then open the Weston County ArcGIS parcel map for Weston County to confirm the parcel near Newcastle. If the Weston County viewer has a floodplain layer, treat it as a convenience copy and confirm on FEMA's map.
The county map you'll pair it with
The county's own public map is the Weston County ArcGIS parcel map, built on an Esri ArcGIS web map, and it opens without an account for parcels in Upton and the rest of the county. Most people locate their Weston County tract fastest by searching an address in Hill View Heights, then clicking the outline. Bookmark our Weston County page too; it tracks the official Wyoming link if it moves and lists the maps around Upton.
Tracts that cross the Weston County line
A farm near the county line can carry separate records in Custer County, SD, Lawrence County, SD, and Pennington County, SD as well. Our Wyoming page links each map neighboring Weston County.
Recorded documents in Weston County, Wyoming
Deeds and plats behind the Weston County map are kept by the county's recording office; the official Weston County website names which office that is. Copy the parcel number and legal description from the county record well before you request a deed for land near Newcastle.
The lay of the land around Newcastle
Town lots cluster around Newcastle, the county seat, and Upton. Unincorporated communities in the county, including Hill View Heights, Osage, and Buckhorn, display up as small groups of parcels along the roads. Weston County had an estimated 6,808 people in 2023 (Census Bureau), spread across about 2,398 square miles. Beyond the town lots in Newcastle, expect big rural parcels across the county. With a founding date of 1890, Weston County has long chains of title on some rural tracts.
Reading the zones on a Weston County flood map
For a lot in Newcastle, the label matters more than the color: A and V zones are Special Flood Hazard Areas, land with a 1-percent chance of flooding in any given year (the base or 100-year flood). Where a Weston County tract shows Zone AE, there's a base flood elevation to compare a building against; in Zone A there is not one. Land near Upton in shaded X (Zone B on older maps) sits in the moderate band between the 100-year and 500-year floods. Clear, unshaded X near Newcastle is outside the 500-year floodplain.
Low ground and small streams around Newcastle
Small streams and ditches near Newcastle may not be studied in detail, which is why it's worth walking the ground after a heavy rain.
What a flood zone means for a Weston County buyer
Insurance is the practical stake for a Weston County buyer. Where a building in Newcastle is mapped in a high-risk zone and is financed by a regulated or federally insured lender, federal rules call for flood insurance; that applies where the local government around Upton is in the National Flood Insurance Program. For a county home in shaded or unshaded X, coverage is optional; pricing a policy for land near Upton is still worth a call. Where a structure near Newcastle looks higher than the shading suggests, a Letter of Map Amendment request is the formal route, most frequently backed by an elevation certificate from a surveyor who works in the county. Placing fill on low ground near Newcastle most frequently needs a floodplain permit; the county floodplain administrator can say what applies.
Weston County, WY: common questions
How do I know if a property in Weston County is in a flood zone?
FEMA's free map service covers Weston County: enter the address or pan to the tract near Hill View Heights, then note the zone label.
Is Zone AE near Hill View Heights high risk?
Zone AE on a lot in Upton is a mapped 100-year floodplain with a base flood elevation, so mandatory insurance rules apply to federally backed mortgages.
How do I challenge a flood zone for a lot in Upton?
FEMA reviews requests such as a LOMA for Weston County properties; start with an elevation certificate.
What does BFE mean on the flood map for Upton?
For a Weston County property in Zone AE, the base flood elevation marks how high the 100-year flood is expected to rise; elevation certificates in Weston County are measured against it.
Does a 100-year floodplain near Hill View Heights flood only once a century?
Not at all; a county tract in that zone faces a 1-percent annual chance, and two floods in one decade near Upton are possible.
Is there a floodplain layer in the Weston County ArcGIS parcel map?
Check the layer list in the Weston County ArcGIS parcel map; if Weston County includes a floodplain layer, confirm the zone on FEMA's map anyway.
Open the official Weston County, WY parcel map Weston 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.