Blog · October 14, 2026 · Illinois
Using the Brown County Flood Zone Map
Flood zones are set by FEMA, and checking one near Benville takes a few minutes.
Main page: Brown County, IL GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Weighing a property around Fargo? A quick look at the Brown County flood zone map shows whether it sits in a FEMA flood zone, and no account is needed. This Brown County guide covers: finding the address on FEMA's map, decoding A, AE and X, and pairing it with the Sidwell Portico.
Checking the Brown County flood zone map step by step
For parcel-by-parcel detail, open the National Flood Hazard Layer viewer, where zone shading sits over a photo base, whether the land is near Fargo or elsewhere in the county. Vacant ground around Mount Sterling is still easy to locate: zoom in from the nearest road and click the spot.
The viewer Brown County publishes
Parcels around Mount Sterling appear on the Sidwell Portico, free to use and open without a login. For a parcel near Cooperstown, type a street address, an owner's name or a parcel number, and the matching parcel lights up. If the land is near Mount Sterling, the parcel card usually lists the owner of record, assessed acreage, the parcel number and in many cases the last transfer.
On site with the map
The parcel map usually runs in a mobile browser, useful out on a road near Fargo, though signal can drop in rural spots. A screenshot of the parcel near Cooperstown with its ID keeps working without signal.
A quick look at the area
Mount Sterling holds the county offices, home to the main records offices. Other places on the map include Benville, Buckhorn, Cooperstown, and Damon. Roughly 6,294 people live in Brown County (Census estimate, 2023) spread over some 306 square miles. Brown County was organized in 1839, and some chains of title near Damon are long.
Reading A, AE and X
For acreage around Mount Sterling, A and V zones are Special Flood Hazard Areas, meaning a 1% or greater chance of flooding each year. For a parcel near Fargo, a shaded X area is moderate risk, roughly the 100- to 500-year range; unshaded X means minimal mapped risk.
A word on accuracy
If you're looking near Fargo, the acreage figure is an estimate; just a licensed surveyor can set the real boundary on the ground. For a tract near Mount Sterling, records update in batches, so a deed recorded last month can take weeks to appear.
What to request from a seller
For a home near Mount Sterling, ask the seller for any Elevation Certificate before closing; getting a quote early avoids surprises.
Deeds, plats and who keeps them
The map is an index, not the title: deeds, subdivision plats and easements covering ground around Damon are filed with the county Recorder of Deeds (in many counties the County Clerk and Recorder). If the land is near Benville, use the instrument number shown in the record panel so staff can find the deed fast.
Use the county map alongside FEMA
FEMA's map shows zones but not ownership, so pair it with the Sidwell Portico to see exactly which lot near Buckhorn you're looking at.
Neighboring parcel maps
Brown County meets Adams County, Cass County, Morgan County, Pike County, and Schuyler County; every one of them runs a separate parcel map. Acreage along the edge near Damon can be split across two assessors' files, so look at the adjacent map too. For a tract near Mount Sterling, our state page lists each bordering county map for Illinois.
Offices that can help
Questions about value or the owner field for land near Benville belong with the Supervisor of Assessments, working with township assessors, which maintains the tax roll. Zoning, permits and septic questions near Mount Sterling go to planning, building or health offices, town or county, depending on location.
Low spots and local drainage
Creeks and ditches near Benville aren't always studied in detail, so walk the land after rain. Wet ground around Buckhorn is a separate issue from flood zones; check the National Wetlands Inventory mapper for a first look.
Money questions tied to the zone
For acreage around Benville, get the Elevation Certificate if one exists: it can change the insurance price a lot. New construction in a floodplain near Mount Sterling often needs a floodplain permit; check with the county or town building office before you plan.
Brown County: common questions
What is the difference between Zone A and AE in Brown County?
An AE zone has a 1% annual chance of flooding and a base flood elevation, which shapes building rules near Benville.
What is a base flood elevation around Damon?
Out toward Mount Sterling, the base flood elevation is the water level expected in the 1% annual chance flood, and an Elevation Certificate compares the building to it.
Can I see flood zones on the Sidwell Portico for land near Damon?
In and around Buckhorn, a flood layer may appear in the Sidwell Portico layer list, but FEMA's own map is the official source.
Do I need to worry about flooding in Zone X near Mount Sterling?
In and around Buckhorn, shaded X is moderate risk and unshaded X is minimal risk, and floods still happen outside high-risk zones.
What's the tax parcel number used for near Fargo?
It's the number the Supervisor of Assessments, working with township assessors uses to track a tract near Benville; you'll see it in the viewer and on tax statements.
Open the official Brown County, IL 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.