Blog · October 14, 2026 · Wyoming
Fremont County Flood Zone Map (Wyoming)
How to check if a property in Fremont County sits in a FEMA flood zone, and what the answer means for a buyer near Riverton.
Main page: Fremont County, WY GIS & Parcel Viewer (official map link, Fremont County facts and neighboring maps).
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Before you buy a house in Lander, add on to a barn near Shoshoni, or price a lot along the creek bottoms near Ethete, check the Fremont County flood zone map. For any tract in Fremont County, Wyoming, the answer affects insurance, permits and resale.
Next: FEMA's search tool, the zone labels you'll see for Fremont County, and how the parcel record confirms which tract you're on.
How to use the Fremont County flood zone map
The authoritative source for a Fremont County flood zone map is FEMA, so begin at the FEMA Flood Map Service Center. Search returns the effective FIRM panel for the spot in Fremont 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, so you can see if the shading reaches a house near Hudson. Then open the Fremont County Beacon site for Fremont County to confirm the parcel near Dubois. Match the Fremont County lines and acreage to the FEMA view, since flood maps do not draw property lines in detail.
Opening the Fremont County parcel viewer
Fremont County publishes its parcels on the Fremont County Beacon site, which runs on Schneider Geospatial's Beacon platform, free to use for a lot in Hudson or a piece of ground near Dubois. In the county version, the search page takes an owner, an address or a parcel ID, and each report links back to the map view for the piece of ground near Hudson. Our Fremont County, WY page keeps the official link and the maps next door to Dubois in one place.
High, moderate and minimal risk in Fremont County
On the FIRM covering Fremont County, zones that start with A or V are Special Flood Hazard Areas, meaning FEMA estimates a 1-percent annual chance of flooding. Where a Fremont County tract displays Zone AE, there's a base flood elevation to compare a building against; in Zone A there isn't one. Shaded Zone X around Dubois is moderate risk, between the 1-percent and 0.2-percent annual chance lines. Clear, unshaded X near Dubois is outside the 500-year floodplain.
Unmapped creeks in Fremont County
A low spot on a Fremont County tract outside any mapped zone, which is why it is worth walking the ground after a heavy rain.
Seller questions about flood history
Request any past flood claims history for a Fremont County property before closing; it tells you more than the map alone. Quotes for land near Ethete depend on the zone and the building's elevation, so bring both to the agent.
Floodways and restudies near Pavillion
Look at the effective date printed on the county panel, since a new study can redraw zones around Dubois. Floodways, shown as hatched areas on some panels, are the channel and nearby land that must stay open, and building there near Dubois faces the strictest rules.
Insurance, permits and map changes
Here's why the zone matters at a closing in Dubois. If a house near Hudson 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, provided the community near Dubois takes part in the National Flood Insurance Program. Outside the A zones around Hudson, federal rules do not require a policy; pricing a policy for land near Hudson is still worth a call. Where a structure near Dubois looks higher than the shading suggests, a Letter of Map Amendment request is the formal route; a surveyor near Hudson can supply the elevation data. Placing fill on low ground near Dubois has to meet local floodplain rules, so call the county or the town office in Dubois before work starts.
Fremont County flood zones questions
Do I need flood insurance in Zone X in Fremont County?
For a Zone X house near Dubois, federal rules do not require flood insurance; buying it is still a choice worth pricing.
Where do I get an elevation certificate in Fremont County?
Hire a licensed surveyor or engineer who works in Fremont County; ask the local floodplain office first in case one exists.
Do I need a permit to build in the floodplain near Pavillion?
Often, but local floodplain rules apply; ask the county or town building office in Pavillion before you buy.
Is there a floodplain layer in the Fremont County Beacon site?
Check the layer list in the Fremont County Beacon site; if Fremont County includes a floodplain layer, confirm the zone on FEMA's map anyway.
How do I know if a property in Fremont County is in a flood zone?
Look it up at FEMA's Flood Map Service Center, then match the parcel lines in the Fremont County Beacon site; for land near Dubois, a zone starting with A or V is high risk.
Open the official Fremont County, WY parcel map Fremont 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.