Blog · October 14, 2026 · Illinois
Mattoon Flood Zone Map: checking a property's flood zone
The zone on FEMA's map affects insurance, building and resale near Ashmore.
Main page: Coles County, IL GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Weighing a property around Oakland? Checking the Mattoon flood zone map reveals whether the lot falls inside a mapped floodplain, and the lookup is free. What this Mattoon guide covers: finding the address on FEMA's map, decoding A, AE and X, and pairing it with the Coles County ArcGIS parcel map.
Where the Mattoon flood zone map lives
Start with FEMA's Flood Map Service Center: type an address near Humboldt, and pick the FIRMette or map view. A tract near Lerna without an address can still be found: zoom in from Interstate 57 and click the spot.
The viewer Coles County publishes
Parcels around Lerna appear on the Coles County ArcGIS parcel map, free to use and open without a login. For a tract near Ashmore, put in a street address, an owner's name or a parcel number, and the matching parcel lights up. On ground around Humboldt, write down the parcel ID while you have it open; every records desk in the county asks for it first.
Field tips
The parcel map usually runs in a mobile browser, useful out on a road near Ashmore, though signal can drop in rural spots. A screenshot of the parcel near Ashmore with its ID helps when you meet an owner or agent.
What the map can't tell you
Acreage on the record is an estimate; only a licensed surveyor establishes the real corners for a parcel near Ashmore. Near Lerna, records update in batches, so a deed recorded last month can take weeks to appear.
What to request from a seller
Ask the seller for any Elevation Certificate for the house near Oakland; an insurance quote early keeps the budget honest.
Where Mattoon fits in
Mattoon is part of Coles County, Illinois, which means parcel data comes from the county. For property near Charleston, 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 town limits near Oakland generally falls under county rules, not municipal ones.
What the zone letters mean
An AE label includes a base flood elevation (BFE), which plain A zones lack; surveyors near Humboldt use that number. For a tract near Oakland, shaded Zone X is moderate risk, between the 1% and 0.2% annual chance floods; unshaded X is minimal risk.
Parcel lines plus flood zones
FEMA's map shows zones but not ownership, so pair it with the Coles County ArcGIS parcel map for the outline of the tract near Oakland.
Getting answers from the right desk
If the acreage or value on a parcel near Humboldt looks off belong with the Supervisor of Assessments, working with township assessors, the office behind the parcel record. Zoning, permits and septic questions near Lerna go to planning, building or health offices, town or county, depending on location.
Land on the county line
Coles County meets Clark County, Cumberland County, Douglas County, Edgar County, and Moultrie County, and each of those keeps its own parcel map. Acreage along the edge near Humboldt can be split across two assessors' files, so open the neighboring map before you assume the acreage. For acreage around Humboldt, the Platbookmapper state page links every bordering county map for Illinois.
Money questions tied to the zone
Out toward Charleston, ask for an Elevation Certificate: it compares the building to the BFE. New construction in a floodplain near Lerna usually means extra permit review; check with the county or town building office early.
Beyond the mapped zones
Low-lying fields near Lerna aren't always studied in detail, so look for water marks and debris lines. Wetlands near Lerna can limit building even outside a flood zone; check the National Wetlands Inventory mapper for a first look.
The paper trail behind a parcel
The map is an index, not the title: deeds, plats and easements for land near Charleston are filed with the county Recorder of Deeds (in many counties the County Clerk and Recorder). For land near Humboldt, have ready the instrument number listed on the parcel record and the lookup takes minutes.
Coles County in a few facts
Charleston holds the county offices, home to the main records offices. You'll also find Lerna, Humboldt, and Ashmore. About 46,060 people live in Coles County (Census estimate, 2023) on about 508 square miles. The county was formed in 1830, and some chains of title near Lerna are long.
Questions about the Mattoon flood zone map
Is Zone X safe from flooding around Lerna?
Short answer: Zone X near Ashmore means moderate (shaded) or minimal (unshaded) mapped risk; FEMA notes that a large share of claims come from these areas.
What does an AE label mean for a lot near Humboldt?
Good question; an AE zone has a 1% annual chance of flooding and a base flood elevation, so builders near Humboldt design to that elevation.
What is a LOMA near Charleston?
In most cases, FEMA's LOMA process is the usual route when a building near Charleston sits above the base flood elevation, and lenders accept the result.
What is a base flood elevation in Mattoon?
Short answer: a BFE near Oakland tells builders how high the lowest floor should be; surveyors near Charleston use it often.
What's the tax parcel number used for around Lerna?
It's the number the Supervisor of Assessments, working with township assessors uses to track a tract near Ashmore; copy it before you call anyone.
Open the official Coles 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.