Blog · October 14, 2026 · Wyoming
Platte County Flood Zone Map, Wyoming
How to check whether a property in Platte County sits in a FEMA flood zone, and what the answer means for a buyer near Wheatland.
Main page: Platte County, WY GIS & Parcel Viewer (official map link, Platte 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.
A Platte County flood zone map check belongs in the due diligence for any Platte County property, from a house lot in Hartville to farm ground near Glendo. Here's how to read FEMA's map for a Platte County, WY property and match it to the parcel record.
We'll cover finding a Platte County address on FEMA's map, what Zone A, AE and X mean, how the county viewer fits in, and what to do if the map looks wrong.
Look up the Platte County flood zone map step by step
The authoritative source for a Platte County flood zone map is FEMA, so begin at the FEMA Flood Map Service Center. If a piece of ground near Hartville has no street number yet, search the nearest road and pan to it. If the PDF panel for Platte County is hard to read, the National Flood Hazard Layer viewer is easier to use; zoom to the piece of ground near Hartville and click. Then open the Platte County parcel viewer for Platte County to confirm the parcel near Guernsey. Match the Platte County lines and acreage to the FEMA view, since flood maps don't draw property lines in detail.
The county map you'll pair it with
For land around Hartville, open the Platte County parcel viewer; it is the map Platte County itself publishes. Most people locate their Platte County tract fastest by searching an address in Hartville, then clicking the outline. Our Platte County, WY page keeps the official link and the maps next door to Hartville in one place.
High, moderate and minimal risk in Platte County
For a lot in Guernsey, the label matters more than the color: A and V zones are Special Flood Hazard Areas, land with a 1-percent chance of flooding in any given year (the base or 100-year flood). Where a Platte 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 Guernsey sits in the moderate band between the 100-year and 500-year floods. Unshaded X (or C) on the Platte County panel means minimal risk.
Unmapped creeks in Platte County
A low spot on a Platte County tract outside any mapped zone, which is why it is worth walking the ground after a heavy rain.
A short buyer checklist for Chugwater
For a house near Guernsey, ask the seller for any elevation certificate on file and the current flood insurance declarations page. Quotes for land near El Rancho depend on the zone and the building's elevation, so bring both to the agent.
Reading the fine print on a Platte County panel
Look at the effective date printed on the county panel, since a new study can redraw zones around Chugwater. If a piece of ground near Guernsey displays a hatched floodway, expect tight limits on fill and new structures from the county floodplain office.
Insurance, permits and map changes
Here's why the zone matters at a closing in Guernsey. If a barn or house outside Guernsey falls inside an A or V zone and carries a federally backed mortgage, federal rules call for flood insurance; that applies where the local government around Hartville is in the National Flood Insurance Program. In Zone X near Guernsey, coverage is optional; pricing a policy for land near Hartville is still worth a call. When a Platte County homesite is on a rise inside a mapped zone, FEMA's LOMA process allows a review, most often backed by an elevation certificate from a surveyor who works in Platte County. Adding on to a house near Hartville inside the zone has to meet local floodplain rules, so call the county or the town office in Guernsey before work starts.
Quick answers for Platte County
Is there a floodplain layer in the Platte County parcel viewer?
Check the layer list in the Platte County parcel viewer; if Platte County includes a floodplain layer, confirm the zone on FEMA's map anyway.
Where do I get an elevation certificate in Platte County?
A professional surveyor or engineer prepares it, and the building office serving Glendo may already have one on file for newer construction.
What if FEMA's map is wrong about my house near Wheatland?
For a lot in Glendo, hire a surveyor for an elevation certificate, then file a LOMA request with FEMA.
Do I need a permit to build in the floodplain near Glendo?
Often, but local floodplain rules apply; ask the county or town building office in Glendo well before you buy.
Does a 100-year floodplain near Wheatland flood only once a century?
Not at all; a Platte County tract in that zone 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 Platte County property?
On the map covering Glendo, the BFE is the height floodwater is expected to reach in the 1-percent-annual-chance flood, and it is printed in AE zones.
Open the official Platte County, WY parcel map Platte 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.