Blog · October 14, 2026 · Wyoming
Casper Flood Zone Map, Wyoming: a practical guide
The zone on FEMA's map affects insurance, building and resale near Bar Nunn.
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 Edgerton, check the Casper flood zone map: FEMA's zone label affects insurance, building rules and resale. In this Casper guide: locating a parcel on FEMA's map, reading the zone codes, and pairing it with the Natrona County ArcGIS parcel map.
Where the Casper flood zone map lives
The official source is FEMA's Flood Map Service Center: type an address near Mills, and pick the FIRMette or map view. Vacant ground around Evansville is still easy to locate: search the nearest road and click the spot.
The viewer Natrona County publishes
Parcels around Mills can be looked up on the Natrona County ArcGIS parcel map, free to use and open without a login. If you only know roughly where the land is, pan along the nearest road and click the parcel itself, and that holds around Mills too. For a parcel near Mills, a pop-up or side panel normally shows the owner of record, assessed acreage, the parcel number and in many cases the last transfer.
Taking the map into the field
The parcel map usually runs in a mobile browser, which helps when you're standing on land near Mills, so load it before you lose signal. A saved image of the lot near Midwest and its lines keeps working without signal.
City limits and county records
Casper is part of Natrona County, Wyoming, and the county assessor maps its lots. As the county seat, Casper hosts the courthouse, which puts the County Clerk close by. For land near Bar Nunn, city or town hall handles things like zoning, permits and utilities within town limits, while the county keeps the tax map. Land beyond the city limits out by Evansville usually answers to county rules, not municipal ones.
Next door to Natrona County
Natrona County borders Carbon County, Converse County, Fremont County, Johnson County, and Washakie County, all with their own assessor records. Ground near Evansville that runs to the line can be split in two county records, so open the adjacent map too. The Platbookmapper state page lists each neighboring county map for Wyoming.
Reading the legal description
Wyoming uses the Public Land Survey System, so rural legal descriptions near Bar Nunn cite section, township and range. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though corrections make some sections near Bar Nunn odd-sized. Keep the legal description for land near Midwest when you talk to a surveyor.
Decoding the flood zone labels
An AE label includes a base flood elevation (BFE), and an unnumbered A zone has none; surveyors near Evansville use that number. For a parcel near Edgerton, shaded Zone X marks moderate flood hazard, between the 1% and 0.2% annual chance floods; unshaded X means minimal mapped risk.
Low spots and local drainage
Low-lying fields near Midwest aren't always studied in detail, so walk the land after rain. Wetlands near Mills can limit building even outside a flood zone; the National Wetlands Inventory mapper shows mapped wetlands.
Who handles what
For assessment questions about property around Bar Nunn are handled by the County Assessor, the office behind the parcel record. Zoning, permits and septic questions near Evansville are for the local planning and health departments, depending on whether the land is inside town limits.
Lining it up with the parcel map
FEMA doesn't draw property lines, so pair it with the Natrona County ArcGIS parcel map for the outline of the tract near Midwest.
What the map can't tell you
Parcel lines are drawn for taxes, not surveyed, so the edge of a yard near Midwest may sit a few yards off the line on screen. If the land is near Mills, records update in batches, so a deed recorded last month might lag behind.
What to request from a seller
Ask the seller whether the home has flooded on the property near Midwest; getting a quote early keeps the budget honest.
Insurance, lenders and building
For acreage around Bar Nunn, get the Elevation Certificate if one exists: it compares the building to the BFE. Remodeling a house in a zone near Bar Nunn often needs a floodplain permit; check with the county or town building office early.
Questions about the Casper flood zone map
Do I need to worry about flooding in Zone X near Evansville?
Short answer: X zones around Midwest are lower risk, not no risk; many owners near Mills buy coverage anyway.
What is a base flood elevation in Casper?
A BFE near Bar Nunn tells builders how high the lowest floor should be; surveyors use it often.
How do I check the flood zone for an address in Casper?
Usually, FEMA's free map shows the zone for any spot near Edgerton; then confirm the parcel on the county viewer.
Is AE a high-risk flood zone for land near Mills?
Good question; an AE zone has a 1% annual chance of flooding and a base flood elevation, so builders near Evansville design to that elevation.
Who do I call about a parcel near Bar Nunn?
For land near Midwest, assessment goes to the County Assessor and deeds to the County Clerk.
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.