Blog · October 14, 2026 · Illinois
Using the Jerseyville Flood Zone Map
Flood zones are set by FEMA, and checking one near Fieldon takes a few minutes.
Main page: Jersey County, IL GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before you buy or build near Fidelity, check the Jerseyville flood zone map: FEMA's zone label affects insurance, building rules and resale. This Jerseyville guide covers: locating a parcel on FEMA's map, decoding A, AE and X, and pairing it with the Jersey County ArcGIS parcel map.
Checking the Jerseyville flood zone map step by step
The official source is FEMA's Flood Map Service Center: search an address around Grafton, and pick the FIRMette or map view. A tract near Elsah without an address can still be found: zoom in from US Route 67 then click the parcel area.
The viewer Jersey County publishes
Your first stop is the Jersey County ArcGIS parcel map; it covers every assessed parcel from Fieldon to Brighton. If you only know roughly where the land is, follow US Route 67 on the aerial and click the parcel itself. In and around Otterville, the record panel usually lists the owner of record, acreage on the tax roll, the parcel number and in many cases the last transfer.
Where Jerseyville fits in
Jerseyville is part of Jersey County, Illinois, which means parcel data comes from the county. As the county seat, Jerseyville hosts the courthouse, so deeds and plats are filed in town. Near Grafton, the municipality handles things like zoning, permits and utilities for lots inside the boundary, and the county still keeps the parcel and deed records. Lots just outside the city limits out by Grafton generally falls under county rules rather than the town's.
Zones on the Jerseyville flood zone map
An AE label comes with a base flood elevation, which plain A zones lack; surveyors near Fieldon use that number. With a lot near Grafton, a low-risk label isn't a guarantee: according to FEMA, floods happen outside mapped zones too.
Offices that can help
If the acreage or value on a parcel near Grafton looks off belong with the Supervisor of Assessments, working with township assessors, which maintains the tax roll. Building or septic questions for a lot near Elsah go to planning, building or health offices, depending on whether the land is inside town limits.
Water near Brighton
Creeks and ditches near Fieldon may not have detailed mapping, so look for water marks and debris lines. Wetlands near Grafton can limit building even outside a flood zone; check the National Wetlands Inventory mapper for a first look.
On site with the map
The parcel map usually runs in a mobile browser, useful out on a road near Fieldon, but coverage can be spotty out of town. A saved image of the lot near Fidelity and its lines keeps working without signal.
How land is described here
Illinois is laid out under the Public Land Survey System, so rural legal descriptions near Elsah cite section, township and range. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though sections near Fidelity can be irregular. Keep the legal description for land near Grafton for any title or survey request.
Use the county map alongside FEMA
FEMA doesn't draw property lines, so pair it with the Jersey County ArcGIS parcel map to confirm you have the right parcel near Fieldon.
What to request from a seller
Ask the listing agent about past flood claims on the property near Otterville; getting a quote early keeps the budget honest.
Deeds, plats and who keeps them
The map is an index, not the title: deeds, plats and easements for land near Brighton are kept by the county Recorder of Deeds (in many counties the County Clerk and Recorder). In and around Fidelity, have ready the document number shown in the record panel so staff can find the deed fast.
Insurance, lenders and building
Near Elsah, ask for an Elevation Certificate: it records the building's elevation against the base flood. Building or adding on near Grafton in a mapped zone usually means extra permit review; call the permitting office early.
What the map can't tell you
The acreage figure is an estimate; only a licensed surveyor can set the real lines for a parcel near Fieldon. If the land is near Fidelity, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Frequently asked
Can I challenge a flood zone near Brighton?
Generally, you can ask FEMA for a LOMA if surveyed elevations show the building near Fieldon is above the BFE; it starts with an elevation survey.
How do I check the flood zone for an address in Jerseyville?
For most people, look up the spot near Fidelity in FEMA's National Flood Hazard Layer viewer; then confirm the parcel on the county viewer.
Is AE a high-risk flood zone around Elsah?
Good question; both are high-risk zones, but only AE has a base flood elevation, so builders near Elsah design to that elevation.
When is flood insurance required near Otterville?
Good question; lenders generally require it for buildings near Elsah in a Special Flood Hazard Area when the loan is federally regulated or insured; elsewhere it's optional.
Who keeps deeds for property in Jerseyville?
Values are the Supervisor of Assessments, working with township assessors's job; recorded documents belong to the county Recorder of Deeds (in many counties the County Clerk and Recorder); planning offices cover zoning near Elsah
Open the official Jersey 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.