Blog · October 14, 2026 · Illinois
Marshall County Flood Zone Map, Illinois: a practical guide
Flood zones are set by FEMA, and checking one near Chautauqua National Wildlife Refuge takes a few minutes.
Main page: Marshall County, IL GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before an offer near Sparland, pull up the Marshall County flood zone map: FEMA's zone label affects insurance, building rules and resale. In this Marshall County guide: locating a parcel on FEMA's map, decoding A, AE and X, and confirming the outline on the county map.
Checking the Marshall County flood zone map step by step
If you'd rather pan and zoom, use the National Flood Hazard Layer viewer, where zone shading sits over a photo base, which applies near Camp Grove as much as anywhere. A tract near Illinois River without an address is still easy to locate: zoom in from Interstate 39 and click the spot.
Pulling up a parcel
Parcels around Leeds can be looked up on the Marshall County parcel viewer, which opens without registering. On ground around Wenona, type a street address, an owner's name or a parcel number, and the matching parcel lights up. For acreage around Lawn Ridge, write down the parcel ID before closing the panel; every records desk in the county uses it to find the file.
Reading A, AE and X
For a tract near Henry, A and V zones mark the Special Flood Hazard Area, meaning a 1% or greater chance of flooding each year. On ground around La Rose, a low-risk label isn't a guarantee: FEMA notes that many claims come from moderate- and low-risk areas.
What to request from a seller
Near Henry, request for any Elevation Certificate before closing; getting a quote early avoids surprises.
Places you'll see on the map
Lacon is the county seat, where most land records are kept. Smaller places on the map include Henry, Toluca, Wenona, and Hopewell, where town lots give way to larger tracts. About 11,683 people live in Marshall County (Census estimate, 2023) on some 387 square miles. Marshall County dates to 1839, and some chains of title near La Rose are long. Features like Illinois River and Chautauqua National Wildlife Refuge help you orient on the aerial around Chautauqua National Wildlife Refuge.
How land is described here
Illinois uses the Public Land Survey System, so rural legal descriptions near Hopewell Estates cite section, township and range. A standard section is about one square mile, roughly 640 acres, with 36 sections to a township, though sections near Lawn Ridge can be irregular. Write down the legal description for the tract near Toluca before you request a deed or survey.
Deeds, plats and who keeps them
For anything that matters, get the recorded deed through the county Recorder of Deeds (in many counties the County Clerk and Recorder); the parcel map near Sparland only summarizes it. On ground around La Prairie Center, have ready the book and page from the tax record so staff can find the deed fast.
Offices that can help
Questions about value or the owner field for land near Lawn Ridge belong with the Supervisor of Assessments, working with township assessors, since that office keeps the assessment data. Building or septic questions for a lot near Leeds need the planning or permitting office, town or county, depending on location.
Taking the map into the field
The parcel map usually runs in a mobile browser, which helps when you're standing on land near La Rose, though signal can drop in rural spots. A printout of the tract near Wenona is a good backup.
Lining it up with the parcel map
When the zone clips a corner of a lot near La Prairie Center, the location of the house or building pad decides a lot.
Lenders and permits
For a structure inside an A or V zone and the loan is federally backed or regulated, the lender will require flood insurance where the community participates in the National Flood Insurance Program, which applies near La Prairie Center as much as anywhere. New construction in a floodplain near Illinois River usually means extra permit review; ask the local floodplain administrator early.
Low spots and local drainage
Low-lying fields near Lawn Ridge may not have detailed mapping, so ask neighbors about past flooding. Wet ground around Wenona is a separate issue from flood zones; the National Wetlands Inventory mapper shows mapped wetlands.
Quick answers
Is my property near Leeds in a flood zone?
In most cases, FEMA's free map shows the zone for any spot near Lacon; no account is needed.
How do I get a property removed from a flood zone in Marshall County?
For acreage around Leeds, a Letter of Map Amendment (LOMA) from FEMA can remove a structure on naturally high ground, and lenders accept the result.
Where do I find the BFE for a lot near Wenona?
Short answer: a BFE near Toluca tells builders how high the lowest floor should be; surveyors near La Rose use it often.
What does an AE label mean for a lot near Illinois River?
For a parcel near Leeds, an AE zone has a 1% annual chance of flooding and a base flood elevation; unnumbered A zones don't list one.
Is there a way to export the map near Hopewell Estates?
For a parcel near Sparland, some viewers offer PDF export; downloads of raw data vary by county.
Open the official Marshall 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.