Blog · October 14, 2026 · Wyoming
Converse County Flood Zone Map, Wyoming
FEMA's free flood maps and the Converse County parcel viewer, used together for property near Douglas.
Main page: Converse County, WY GIS & Parcel Viewer (official map link, Converse County facts and neighboring maps).
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A Converse County flood zone map check belongs in the due diligence for any Converse County property, from a house lot in Lost Springs to farm ground near Douglas. You can check it yourself for any Lost Springs address in a few minutes.
Next: FEMA's search tool, the zone labels you'll see for Converse County, and how the parcel record confirms which tract you're on.
How to use the Converse County flood zone map
The authoritative source for a Converse County flood zone map is FEMA, so begin at the FEMA Flood Map Service Center. If a tract near Lost Springs has no street number yet, search the nearest road and pan to it. For an interactive view of the county, the National Flood Hazard Layer viewer is easier to use, so you can see whether the shading reaches a house near Lost Springs. Then open the Converse County parcel viewer for Converse County to confirm the parcel near Rolling Hills. Laying the county parcel outline beside the FEMA shading lists whether a homesite near Lost Springs sits above or inside the zone.
The county map you'll pair it with
For land around Lost Springs, open the Converse County parcel viewer; it's the map Converse County itself publishes. Most people track down their Converse County tract fastest by searching an address in Lost Springs, then clicking the outline. If the official address for the Converse County, WY map ever changes, our directory page carries the current link for Douglas and the rest of the county.
What the flood zone letters mean
For a lot in Rolling Hills, 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). A surveyor working near Rolling Hills uses the base flood elevation printed for AE zones; unnumbered A zones do not have one. Land near Lost Springs in shaded X (Zone B on older maps) is moderate risk, between the 1-percent and 0.2-percent annual chance lines. Clear, unshaded X near Rolling Hills is outside the 500-year floodplain.
Low ground and small streams around Rolling Hills
A creek near Lost Springs that lists no detailed zone, so treat an unmapped channel as a reason to ask questions, not proof the ground stays dry.
Converse County land records
Deeds and plats behind the Converse County map are kept by the county's recording office; the official Converse County website names which office that is. A deed book and page or instrument number on the county record is the fastest way to request the document for a lot in Rolling Hills.
From Douglas to the back roads
Douglas is the county seat, and Glenrock, Rolling Hills, and Lost Springs are among the other towns on the county map. Smaller places such as Esterbrook, Orin, and Bill appear on the county map as little clusters of lots. Roughly 4,255 square miles of land and about 13,809 residents (2023 estimate) make up Converse County. Outside Douglas, most of the county map is farm, ranch or timber ground with large, irregular tracts. Converse County was organized in 1888, so deeds for older farms near Lost Springs can run back a long way.
Tracts that cross the Converse County line
Near the edge of the county, check the next map over: Albany County, Campbell County, Carbon County, Johnson County, and Natrona County all border it. Our Wyoming page links each map neighboring Converse County.
Insurance, permits and map changes
The zone lists up again when a loan on a house near Lost Springs is underwritten. Where a building in Rolling Hills sits in a Special Flood Hazard Area and carries a federally backed mortgage, federal rules call for flood insurance under the Flood Disaster Protection Act, wherever the community joins the NFIP. Outside the A zones around Lost Springs, federal rules do not require a policy, though a lender in Wyoming can still ask for it. If a building near Lost Springs sits above the flood line, the landowner can ask FEMA for a Letter of Map Amendment (LOMA), supported by elevation data from a licensed surveyor. New construction in a Converse County Special Flood Hazard Area has to meet local floodplain rules, and the building office serving Lost Springs explains the steps.
Converse County, WY: common questions
Do I need flood insurance in Zone X in Converse County?
Not under federal rules; Zone X in Converse County is outside the Special Flood Hazard Area, though a lender can still require coverage.
Does a 100-year floodplain near Lost Springs flood only once a century?
Not at all; a Converse County tract in that zone has a 1-percent chance of flooding every year, so floods can come in back-to-back years.
Do I need a permit to build in the floodplain near Douglas?
Often, but local floodplain rules apply; ask the county or town building office in Douglas well before you buy.
Who prepares an elevation certificate for a house in Douglas?
Hire a licensed surveyor or engineer who works in Converse County; ask the local floodplain office first in case one exists.
Can a flood zone in Converse County be changed?
For a lot in Douglas, hire a surveyor for an elevation certificate, then file a LOMA request with FEMA.
What is a base flood elevation for a Converse County property?
For a Converse County property in Zone AE, the BFE is the height floodwater is expected to reach in the 1-percent-annual-chance flood, and it's printed in AE zones.
Open the official Converse County, WY parcel map Converse 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.