Blog · October 14, 2026 · Illinois
Using the Edwardsville Flood Zone Map
Flood zones are set by FEMA, and checking one near Pontoon Beach takes a few minutes.
Main page: Madison County, IL GIS & Parcel Viewer (official map link, 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.
Weighing a property around Hartford? The Edwardsville flood zone map tells you whether it sits in a FEMA flood zone, and it costs nothing to check. In this Edwardsville guide: locating a parcel on FEMA's map, decoding A, AE and X, and pairing it with the Madison County parcel viewer.
Where the Edwardsville flood zone map lives
Flood zones come from FEMA's Flood Map Service Center: type an address near South Roxana, and choose the dynamic map. Vacant ground around Pontoon Beach can still be found: zoom in from Interstate 255 then click the parcel area.
The free map to start with
Your first stop is the Madison County parcel viewer; it includes each tax parcel from Glen Carbon to Hartford. When a rural tract has no street number, pan along Interstate 255 and select the outline. For a tract near Hartford, the record panel usually lists the owner of record, acreage on the tax roll, a parcel ID and in many cases the last transfer.
Edwardsville, IL: the basics
Edwardsville lies within Madison County, Illinois, which means parcel data comes from the county. As the county seat, Edwardsville hosts the courthouse, handy when you need recorded documents. For acreage around Maryville, the municipality handles things like zoning, permits and utilities for lots inside the boundary, and the county still keeps the parcel and deed records. Land beyond the city limits toward South Roxana generally falls under county rules instead.
What the zone letters mean
An AE label comes with a base flood elevation, while plain Zone A does not; that elevation drives building rules near Glen Carbon. If the land is near Maryville, shaded Zone X marks moderate flood hazard, roughly the 100- to 500-year range; plain X, or C on older maps, is minimal risk.
Matching the zone to the lot lines
FEMA doesn't draw property lines, so check the Madison County parcel viewer too to see exactly which lot near Roxana you're looking at.
The paper trail behind a parcel
The map is an index, not the title: deeds, plats and easements for land near South Roxana are filed with the county Recorder of Deeds (in many counties the County Clerk and Recorder). Around Pontoon Beach, have ready the book and page shown in the record panel and the lookup takes minutes.
A quick look at the area
Edwardsville holds the county offices, where most land records are kept. Smaller places on the map include Glen Carbon, South Roxana, Roxana, and Maryville. About 262,752 people call Madison County home (Census Bureau estimate, 2023) on some 716 square miles. Madison County was organized in 1812, and some chains of title near Hartford are long. Landmarks such as Mississippi River and Horseshoe Lake make handy reference points on the map near Hartford.
Low spots and local drainage
Small streams around Maryville may not have detailed mapping, so walk the land after rain. Marshy spots near Glen Carbon can limit building too; the National Wetlands Inventory mapper shows mapped wetlands.
Reading the legal description
Illinois uses the Public Land Survey System, so deeds around Maryville reference sections and townships. A standard section is about one square mile, roughly 640 acres, with 36 sections to a township, though sections near Maryville can be irregular. Copy the legal description from the record for the parcel near Glen Carbon for any title or survey request.
Taking the map into the field
Most viewers work in a phone browser, which helps when you're standing on land near Glen Carbon, so load it before you lose signal. A screenshot of the parcel near Glen Carbon with its ID helps when you meet an owner or agent.
Before you lean on the lines
Listed acreage is an assessed number; just a licensed surveyor can set the real boundary for a parcel near Maryville. For a home near Glen Carbon, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Money questions tied to the zone
In and around Maryville, get the Elevation Certificate if one exists: it can change the insurance price a lot. Remodeling a house in a zone near South Roxana can trigger elevation rules; check with the county or town building office before you plan.
Questions to ask before you buy
Request for any Elevation Certificate for the house near Maryville; an insurance quote early avoids surprises.
Quick answers
How can I tell if a house near Glen Carbon is in a flood zone?
In most cases, look up the spot near Roxana in FEMA's National Flood Hazard Layer viewer; no account is needed.
Do I need to worry about flooding in Zone X around Pontoon Beach?
Good question; shaded X is moderate risk and unshaded X is minimal risk; many owners near Roxana buy coverage anyway.
What if the flood map is wrong for my lot near Pontoon Beach?
In most cases, you can ask FEMA for a LOMA if surveyed elevations show the building near Glen Carbon is above the BFE; a surveyor's elevation data supports it.
Does the county parcel map show flood zones for land near Glen Carbon?
It depends, but the parcel map near South Roxana might show FEMA zones; confirm a lot near Pontoon Beach on FEMA's map either way.
Does the parcel map work on a phone around Pontoon Beach?
The map near Maryville usually works on a phone; screenshots help offline.
Open the official Madison 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.