Blog · October 14, 2026 · Wyoming
Teton County Flood Zone Map, Wyoming
FEMA's free flood maps and the Teton County parcel viewer, used together for property near Jackson.
Main page: Teton County, WY GIS & Parcel Viewer (official map link, Teton County facts and neighboring maps).
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Before you buy a house in Hoback, add on to a barn near Alta, or price a lot along Yellowstone Lake, check the Teton County flood zone map. FEMA's free Flood Map Service Center and the Teton County parcel viewer answer it together.
The sections below go from the FEMA search to the Teton County parcel record, then cover insurance, permits and map changes near Alta.
Look up the Teton County flood zone map step by step
Start at the FEMA Flood Map Service Center and enter the property address in Hoback or anywhere else in the county. Download the FIRM panel FEMA lists as effective for that part of Teton County. On acreage outside Hoback, FEMA's National Flood Hazard Layer viewer draws the zones over aerial imagery, so you can see if the shading reaches a house near Alta. Next, the Teton County parcel viewer confirms which Teton County parcel you're looking at. The Teton County record gives the parcel ID and legal description that an insurer or lender near Hoback may ask for.
Search Teton County parcels by owner, address or ID
The county's own public map is the Teton County parcel viewer, and it opens without an account for parcels in Hoback and the rest of the county. Use the search box for an address in Hoback or a parcel number, or simply zoom in and click a tract around Alta. For a backup route to the map covering Alta, our Teton County directory entry keeps the link current.
What the flood zone letters mean
Any Teton County parcel shaded as Zone A, AE, AH or AO sits in what FEMA calls a Special Flood Hazard Area, meaning FEMA estimates a 1-percent annual chance of flooding. A surveyor working near Hoback uses the base flood elevation printed for AE zones; unnumbered A zones do not have one. If a Teton County parcel displays shaded Zone X, it sits in the moderate band between the 100-year and 500-year floods. Unshaded Zone X near Alta is minimal risk.
Where water shapes land in Teton County
The Teton County landscape includes Yellowstone Lake, and that's where flood questions cluster. On many parcels near Hoback, the zone covers the low ground by the water while the homesite near the road is outside it. A creek near Alta that displays no detailed zone can still flood; FEMA says moderate- and low-risk areas still carry risk.
When the map affects a deal
Lenders watch the zone closely on Teton County properties. Where a building in Hoback is mapped in a high-risk zone and secures a loan from a federally regulated or insured lender, flood insurance is mandatory, provided the community near Hoback takes part in the National Flood Insurance Program. In Zone X near Hoback, federal rules do not require a policy; pricing a policy for land near Alta is still worth a call. If a building near Alta sits above the flood line, a Letter of Map Amendment request is the formal route; a surveyor near Alta can supply the elevation data. Placing fill on low ground near Hoback typically needs a floodplain permit, so call the county or the town office in Hoback before work starts.
A short buyer checklist for Alta
Request any past flood claims history for a Teton County property before closing; it tells you more than the map alone. Quotes for land near Hoback depend on the zone and the building's elevation, so bring both to the agent.
Tracts that cross the Teton County line
Teton County borders Bonneville County, ID, Fremont County, ID, Teton County, ID, Gallatin County, MT, and Fremont County, and each keeps its own parcel map and records. Our Wyoming page links each map neighboring Teton County.
Teton County, WY: common questions
Is Zone AE near Alta high risk?
Yes, a tract around Alta in Zone AE is high risk: a 1-percent-annual-chance floodplain where FEMA lists a base flood elevation.
How do I challenge a flood zone for a lot in Jackson?
FEMA reviews requests such as a LOMA for Teton County properties; start with an elevation certificate.
Do I need flood insurance in Zone X in Teton County?
For a Zone X house near Alta, federal rules do not require flood insurance; buying it is still a choice worth pricing.
What does BFE mean on the flood map for Jackson?
On the map covering Jackson, the base flood elevation marks how high the 100-year flood is expected to rise, and a surveyor compares the building near Jackson to it.
Is there a floodplain layer in the Teton County parcel viewer?
Some county viewers carry a flood layer, but FEMA's Flood Map Service Center is the official source for Teton County.
Where do I get an elevation certificate in Teton County?
A licensed surveyor or engineer prepares it, and the building office serving Jackson may already have one on file for newer construction.
Open the official Teton County, WY parcel map Teton 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.