Blog · October 14, 2026 · Wyoming
Riverton Flood Map, Wyoming: a practical guide
The zone on FEMA's map affects insurance, building and resale near Pavillion.
Main page: Fremont County, WY GIS & Parcel Viewer (official map link, county facts and neighboring maps).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Before an offer near Shoshoni, check the Riverton flood map: FEMA's zone label affects insurance, permits and resale. This Riverton guide covers: locating a parcel on FEMA's map, reading the zone codes, and pairing it with the Fremont County Beacon site.
Checking the Riverton flood map step by step
Flood zones come from FEMA's Flood Map Service Center: type an address near Dubois, and choose the dynamic map. Vacant ground around Lander is still easy to locate: zoom in from the nearest road and click the spot.
Pulling up a parcel
Go first to the Fremont County Beacon site; it maps every tax parcel in the county, Lander included. In and around Pavillion, put in a street address, an owner's name or a parcel number, and the matching parcel lights up. Around Shoshoni, the parcel card normally shows the owner of record, acreage on the tax roll, a parcel ID and sometimes recent sales.
Where Riverton fits in
Riverton sits in Fremont County, Wyoming, and the county assessor maps its lots. For acreage around Lander, the municipality handles things like zoning, permits and utilities for lots inside the boundary, while the county keeps the tax map. Lots just outside the city limits near Lander often follows county rules, not municipal ones.
Getting your bearings
Lander is the county seat, where most land records are kept. Other places on the map include Hudson, Dubois, and Pavillion, where town lots give way to larger tracts. About 39,815 people call Fremont County home (Census Bureau estimate, 2023) across some 9,184 square miles. Fremont County was organized in 1884, which matters when you trace an old farm's title. Features like Yellowstone National Park make handy reference points on the map near Pavillion.
Reading the legal description
Wyoming uses the Public Land Survey System, so deeds around Pavillion reference sections and townships. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though corrections make some sections near Lander odd-sized. Keep the legal description for land near Shoshoni for any title or survey request.
Neighboring parcel maps
Fremont County touches Carbon County, Hot Springs County, Natrona County, Park County, and Sublette County; every one of them runs a separate parcel map. A tract near the line by Lander may show up in two county records, so open the neighboring map before you assume the acreage. Closer to Shoshoni, our state page lists each neighboring county map for Wyoming.
Reading A, AE and X
For property near Dubois, zones beginning with A or V mark the Special Flood Hazard Area, meaning a 1% or greater chance of flooding each year. Out toward Dubois, shaded Zone X marks moderate flood hazard, roughly the 100- to 500-year range; plain X, or C on older maps, is minimal risk.
Low spots and local drainage
Creeks and ditches near Dubois may not have detailed mapping, so walk the land after rain. Marshy spots near Pavillion can limit building too; check the National Wetlands Inventory mapper for a first look.
Getting answers from the right desk
If the acreage or value on a parcel near Shoshoni looks off belong with the County Assessor, the office behind the parcel record. Building or septic questions for a lot near Lander need the planning or permitting office, and the answer depends on jurisdiction.
Matching the zone to the lot lines
FEMA's map shows zones but not ownership, so check the Fremont County Beacon site too to see exactly which lot near Shoshoni you're looking at.
What a flood zone means for a buyer
For a structure inside an A or V zone and a federally regulated lender is involved, the lender will require flood insurance in communities in the NFIP, whether the land is near Lander or elsewhere in the county. Building or adding on near Shoshoni in a mapped zone often needs a floodplain permit; ask the local floodplain administrator before you plan.
What to request from a seller
Ask the listing agent for any Elevation Certificate for the house near Lander; an insurance quote early keeps the budget honest.
The paper trail behind a parcel
Before you sign anything, request the recorded deed through the County Clerk; the parcel map near Hudson only summarizes it. Long-held tracts around Hudson can sit on several deeds, and a title company is worth hiring before a purchase.
Frequently asked
When is flood insurance required near Shoshoni?
Good question; for a building near Hudson in an A or V zone with a federally backed or regulated mortgage, it's generally required; elsewhere it's optional.
What if the flood map is wrong for my lot near Dubois?
For most people, you can ask FEMA for a LOMA if surveyed elevations show the building near Dubois is above the BFE, and lenders accept the result.
Do I need to worry about flooding in Zone X near Pavillion?
In most cases, X zones around Hudson are lower risk, not no risk; FEMA notes that a large share of claims come from these areas.
What does Zone AE mean near Shoshoni?
For most people, an AE zone has a 1% annual chance of flooding and a base flood elevation, so builders near Lander design to that elevation.
What's the tax parcel number used for near Lander?
Every office uses it to pull the same file for land near Dubois; copy it before you call anyone.
Open the official Fremont 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.