Blog · October 14, 2026 · Wyoming
Reading the Natrona County Flood Zone Map for a parcel
Flood zones are set by FEMA, and checking one near Antelope Hills takes a few minutes.
Main page: Natrona County, WY GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before you buy or build near Evansville, check the Natrona County flood zone map: FEMA's zone label affects insurance, building rules and resale. Covered here for the county: finding the address on FEMA's map, decoding A, AE and X, and pairing it with the Natrona County ArcGIS parcel map around Bessemer Bend.
Where the Natrona County flood zone map lives
If you'd rather pan and zoom, use the National Flood Hazard Layer viewer, where zone shading sits over a photo base, for land near Pathfinder National Wildlife Refuge included. Rural land near Evansville with no street number can still be found: pan from the closest town then click the parcel area.
Where the parcel data lives
The no-cost parcel map for this area is the Natrona County ArcGIS parcel map, and no login is needed to use it. For land near Edgerton, put in a street address, an owner's name or a parcel number, and the matching parcel lights up. Out toward Bar Nunn, save the parcel ID from that panel; each clerk in the county uses it to find the file.
Questions to ask before you buy
For property near Medicine Bow National Forest, ask the listing agent about past flood claims before closing; an insurance quote early keeps the budget honest.
On site with the map
Most viewers work in a phone browser, handy when you're parked on a road near Alcova, but coverage can be spotty out of town. A printout of the tract near Alcova helps when you meet an owner or agent.
What the map can't tell you
With a lot near Midwest, listed acreage is an estimate; just a licensed surveyor can set the real boundary on the ground. For acreage around Evansville, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Land on the county line
Natrona County meets Carbon County, Converse County, Fremont County, Johnson County, and Washakie County, and each of those keeps its own parcel map. A tract near the line by Bessemer Bend can be split across two assessors' files, so check the adjacent map as well. With a lot near Alcova, the Platbookmapper state page links every bordering county map for Wyoming.
Water near Casper Mountain
Creeks and ditches near Medicine Bow National Forest aren't always studied in detail, so walk the land after rain. Wetlands near Bar Nunn can limit building even outside a flood zone; the National Wetlands Inventory mapper shows mapped wetlands.
Decoding the flood zone labels
If the land is near Brookhurst, any A or V zone mark the Special Flood Hazard Area, meaning a 1% or greater chance of flooding each year. For property near Antelope Hills, minimal risk is not no risk: according to FEMA, many claims come from moderate- and low-risk areas.
Which office to call
For assessment questions about property around Edgerton belong with the County Assessor, which maintains the tax roll. Questions about what you can build around Bar Nunn need the planning or permitting office, town or county, depending on location.
Sections, lots and bearings
Wyoming uses the Public Land Survey System, so deeds around Medicine Bow National Forest reference sections and townships. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though corrections make some sections near Midwest odd-sized. Copy the legal description from the record for the parcel near Bar Nunn when you talk to a surveyor.
Recorded documents worth pulling
For anything that matters, get the recorded deed through the County Clerk; the parcel line is a drawing of it, and that holds around Midwest too. If you're looking near Bessemer Bend, bring the book and page shown in the record panel so staff can find the deed fast.
Use the county map alongside FEMA
FEMA doesn't draw property lines, so check the Natrona County ArcGIS parcel map too for the outline of the tract near Pathfinder National Wildlife Refuge.
What a flood zone means for a buyer
For a structure inside an A or V zone and the loan is federally backed or regulated, mandatory purchase rules apply in communities in the NFIP, which applies near Casper as much as anywhere. New construction in a floodplain near Antelope Hills can trigger elevation rules; check with the county or town building office early.
Questions about the Natrona County flood zone map
Can I see flood zones on the Natrona County ArcGIS parcel map?
For most people, some county viewers include a FEMA flood layer; confirm a lot near Bar Nunn on FEMA's map either way.
Do I need to worry about flooding in Zone X for land near Edgerton?
In and around Evansville, shaded X is moderate risk and unshaded X is minimal risk; FEMA notes that a large share of claims come from these areas.
Can I challenge a flood zone near Casper?
Near Casper Mountain, a Letter of Map Amendment (LOMA) from FEMA can remove a structure on naturally high ground; it starts with an elevation survey.
Do I need flood insurance in Natrona County?
Around Casper Mountain, it's typically required only for structures in high-risk zones with federally backed loans, in communities that take part in the NFIP.
How is land described in Wyoming deeds near Medicine Bow National Forest?
Out toward Bar Nunn, it's the formal description of the land in the deed; copy it for any survey or title request.
Open the official Natrona County, WY 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.