Blog · October 14, 2026 · Wyoming
The Sublette County Flood Zone Map: a Wyoming guide
Look up any Sublette County address on FEMA's flood map, read the zone, and match it to the parcel record for land around Big Piney.
Main page: Sublette County, WY GIS & Parcel Viewer (official map link, Sublette County facts and neighboring maps).
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A Sublette County flood zone map check belongs in the due diligence for any Sublette County property, from a house lot in Big Piney to farm ground near Marbleton. FEMA's free Flood Map Service Center and the Sublette County parcel viewer answer it together.
Next: FEMA's search tool, the zone labels you'll see for Sublette County, and how the parcel record confirms which tract you're on.
How to use the Sublette County flood zone map
FEMA's official flood maps for Sublette County are free at the FEMA Flood Map Service Center. Search returns the effective FIRM panel for the spot in Sublette County, plus any pending changes FEMA has posted. If the PDF panel for Sublette County is hard to read, FEMA's National Flood Hazard Layer viewer draws the zones over aerial imagery; zoom to the tract close to Pinedale and click. Next, the Sublette County parcel viewer confirms which Sublette County parcel you're looking at. Laying the county parcel outline beside the FEMA shading lists whether a homesite near Pinedale sits above or inside the zone.
Search Sublette County parcels by owner, address or ID
The county's own public map is the Sublette County parcel viewer, and it opens without an account for parcels in Marbleton and the rest of the county. Use the search box for an address in Marbleton or a parcel number, or simply zoom in and click a tract close to Big Piney. Our Sublette County, WY page keeps the official link and the maps next door to Big Piney in one place.
Reading the zones on a Sublette County flood map
On the FIRM covering Sublette 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 Sublette County tract lists Zone AE, there's a base flood elevation to compare a building against; in Zone A there is not one. Shaded Zone X around Big Piney falls between the base flood and the 500-year flood. Unshaded X (or C) on the Sublette County panel means minimal risk.
Unmapped creeks in Sublette County
Small streams and ditches near Big Piney may not be studied in detail, so treat an unmapped channel as a reason to ask questions, not proof the ground stays dry.
A short buyer checklist for Marbleton
For a house near Big Piney, ask the seller for any elevation certificate on file and the current flood insurance declarations page. Then call an insurance agent who writes policies around Marbleton and get a quote using the zone and the county parcel address.
Floodways and restudies near Big Piney
The FIRM panel for Sublette County carries an effective date; if it's old, ask the county floodplain office whether new maps for land near Big Piney are in progress. If a tract close to Big Piney lists a hatched floodway, expect tight limits on fill and new structures from the county floodplain office.
What a flood zone means for a Sublette County buyer
Insurance is the practical stake for a Sublette County buyer. If a house near Pinedale sits in a Special Flood Hazard Area and carries a federally backed mortgage, a flood policy becomes a loan condition, as long as Sublette County or the town participates in the NFIP. Outside the A zones around Pinedale, insurance is a choice, not a mandate; pricing a policy for land near Pinedale is still worth a call. Where a structure near Big Piney looks higher than the shading suggests, FEMA's LOMA process allows a review, most often backed by an elevation certificate from a surveyor who works in the county. Placing fill on low ground near Big Piney often requires a permit and an elevation check; the county floodplain administrator can say what applies.
Sublette County flood zones questions
Do I need flood insurance in Zone X in Sublette County?
FEMA doesn't require it for a Zone X lot in Marbleton, but coverage is available and some lenders ask for it.
What does 100-year flood mean for Sublette County land?
No, ground around Marbleton mapped that way has a 1-percent chance of flooding every year, so floods can come in back-to-back years.
What is a base flood elevation for a Sublette County property?
Near Big Piney, it's the projected water surface in the base flood, and it's printed in AE zones.
Does the Sublette County parcel map display flood zones?
Check the layer list in the Sublette County parcel viewer; if Sublette County includes a floodplain layer, confirm the zone on FEMA's map anyway.
Where do I get an elevation certificate in Sublette County?
A licensed land surveyor or engineer prepares it, and the building office serving Marbleton may already have one on file for newer construction.
Open the official Sublette County, WY parcel map Sublette 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.