Blog · October 14, 2026 · Wyoming
Using the Sheridan County Flood Zone Map
Flood zones are set by FEMA, and checking one near Big Horn takes a few minutes.
Main page: Sheridan County, WY GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Ahead of any purchase around Powder Horn, pull up the Sheridan County flood zone map: FEMA's zone label affects insurance, building rules and resale. In this county guide: finding the address on FEMA's map, decoding A, AE and X, and matching it with the county parcel viewer for land near Big Horn.
The Sheridan County flood zone map: start here
For a parcel near Parkman, start with FEMA's Flood Map Service Center: enter the street address, and pick the FIRMette or map view. A tract near Big Horn without an address is still easy to locate: search the nearest road and click inside the land.
Where the parcel data lives
The public parcel map for this area is the Sheridan County parcel viewer, and anyone can open it without signing up. With a lot near Clearmont, put in a street address, an owner's name or a parcel number, then pick the result to center the map on it. For a tract near Big Horn, write down the parcel ID before closing the panel; each clerk in the county will want it.
The paper trail behind a parcel
For a parcel near Big Horn, the map is an index, not the title: deeds, plats and easements for parcels in the county are kept by the County Clerk. With a lot near Parkman, use the instrument number shown in the record panel so staff can find the deed fast.
Decoding the flood zone labels
Around Big Horn, A and V zones mark the Special Flood Hazard Area, land with a 1-percent chance of flooding in any year. For property near Big Horn, shaded Zone X marks moderate flood hazard, roughly the 100- to 500-year range; unshaded X means minimal mapped risk.
Getting your bearings
Sheridan holds the county offices, which is where the courthouse records live. You'll also find Clearmont, Dayton, Ranchester, and Arvada, where town lots give way to larger tracts. Roughly 32,519 people call Sheridan County home (Census estimate, 2023) spread over roughly 2,523 square miles. The county was formed in 1888, so old deeds can run back a long way, especially near Bighorn National Forest. Landmarks such as Bighorn National Forest are easy to spot when you zoom out.
Which office to call
If the acreage or value on a parcel near Arvada looks off go to the County Assessor, which maintains the tax roll. Building or septic questions for a lot near Parkman need the planning or permitting office, depending on whether the land is inside town limits.
A word on accuracy
Out toward Arvada, the acreage figure is an estimate; just a licensed surveyor can set the real corners on the ground. For a parcel near Story, records update in batches, so a deed recorded last month might lag behind.
Water near Bighorn National Forest
Low-lying fields near Dayton may not have detailed mapping, so look for water marks and debris lines. Wet ground around Big Horn is a separate issue from flood zones; the National Wetlands Inventory mapper shows mapped wetlands.
Questions to ask before you buy
For a tract near Clearmont, request whether the home has flooded before closing; an insurance quote early keeps the budget honest.
Parcel lines plus flood zones
FEMA's map shows zones but not ownership, so pair it with the Sheridan County parcel viewer for the outline of the tract near Powder Horn.
Land on the county line
The county borders Big Horn County, MT, Powder River County, MT, Big Horn County, Campbell County, and Johnson County; every one of them runs a separate parcel map. Acreage along the edge near Powder Horn can be split across two assessors' files, so check the adjacent map as well. If you're looking near Parkman, the Platbookmapper state page links every neighboring county map across Wyoming.
Field tips
The parcel map usually runs in a mobile browser, which helps when you're standing on land near Powder Horn, though signal can drop in rural spots. A printout of the tract near Ranchester helps when you meet an owner or agent.
Insurance, lenders and building
For land near Big Horn, get the Elevation Certificate if one exists: it records the building's elevation against the base flood. Remodeling a house in a zone near Clearmont often needs a floodplain permit; ask the local floodplain administrator before you plan.
Sheridan County: common questions
How often are flood maps updated around Dayton?
It depends, but zones near Powder Horn can shift when FEMA updates a panel; your community is notified before changes take effect.
Can I see flood zones on the county parcel viewer near Parkman?
It depends, but a flood layer may appear in the Sheridan County parcel viewer layer list, but FEMA's own map is the official source.
What is a LOMA in Sheridan County?
Good question; FEMA's LOMA process is the usual route when a building near Big Horn sits above the base flood elevation, and lenders accept the result.
Is flood insurance mandatory near Ranchester?
It depends, but lenders generally require it for buildings near Ranchester in a Special Flood Hazard Area when the loan is federally regulated or insured, in communities that take part in the NFIP.
How do I save a parcel from the viewer in Sheridan County?
With a lot near Ranchester, some viewers offer PDF export; downloads of raw data vary by county.
Open the official Sheridan 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.