Blog · October 14, 2026 · Illinois
Using the Monmouth Flood Zone Map
Flood zones are set by FEMA, and checking one near Kirkwood takes a few minutes.
Main page: Warren County, IL GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before you buy or build near Kirkwood, pull up the Monmouth flood zone map: a mapped flood zone changes insurance, building rules and resale. What this Monmouth guide covers: the free FEMA tools, what each zone label means, when insurance is required and how to challenge a map that looks wrong.
Checking the Monmouth flood zone map step by step
Flood zones come from FEMA's Flood Map Service Center: search an address around Roseville, and pick the FIRMette or map view. Vacant ground around Roseville is still easy to locate: pan from the closest town and click inside the land.
The viewer Warren County publishes
Begin with the Warren County ArcGIS parcel map; it includes every assessed parcel around Alexis and Roseville. In and around Alexis, enter a street address, an owner's name or a parcel number, and the viewer zooms to the match. Closer to Little York, the parcel card usually lists the owner of record, acreage on the tax roll, the parcel number and sometimes recent sales.
Monmouth and the county around it
Monmouth is part of Warren County, Illinois, so its parcels are on the county's map. As the county seat, Monmouth hosts the courthouse, so deeds and plats are filed in town. Out toward Alexis, the municipality handles matters such as zoning, permits and utilities inside its limits, and the county still keeps the parcel and deed records. Lots just outside the town limits out by Roseville often answers to county rules rather than the town's.
Decoding the flood zone labels
An AE label includes a base flood elevation (BFE), which plain A zones lack; surveyors near Little York use that number. Closer to Alexis, a shaded X area marks moderate flood hazard, roughly the 100- to 500-year range; unshaded X means minimal mapped risk.
Use the county map alongside FEMA
FEMA's map shows zones but not ownership, so check the Warren County ArcGIS parcel map too to see exactly which lot near Little York you're looking at.
Getting answers from the right desk
Anything recorded against property around Alexis come from the county Recorder of Deeds (in many counties the County Clerk and Recorder), usually searchable by name or document number. Building or septic questions for a lot near Alexis are for the local planning and health departments, town or county, depending on location.
Beyond the mapped zones
Low-lying fields near Alexis may not have detailed mapping, so ask neighbors about past flooding. Wet ground around Alexis is a separate issue from flood zones; the National Wetlands Inventory mapper shows mapped wetlands.
Neighboring parcel maps
Warren County borders Fulton County, Henderson County, Knox County, McDonough County, and Mercer County; every one of them runs a separate parcel map. A tract near the line by Little York may be split in two county records, so look at the neighboring map before you assume the acreage. With a lot near Kirkwood, our state page links each bordering county map across Illinois.
Money questions tied to the zone
Closer to Roseville, ask for an Elevation Certificate: it compares the building to the BFE. Remodeling a house in a zone near Little York often needs a floodplain permit; call the permitting office early.
How land is described here
Illinois uses the Public Land Survey System, which means a tract near Alexis is described by section, township and range. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though real sections near Alexis vary in size. Write down the legal description for the tract near Alexis for any title or survey request.
A quick look at the area
Monmouth is the county seat, home to the main records offices. You'll also find Kirkwood, Little York, Alexis, and Roseville, each with its own cluster of lots. About 16,185 people live in Warren County (Census Bureau estimate, 2023) spread over about 542 square miles. The county was organized in 1825, which matters when you trace an old farm's title around Kirkwood.
Questions to ask before you buy
Ask the seller whether the home has flooded for the house near Kirkwood; an insurance quote early keeps the budget honest.
Where the recorded documents are
The map is an index, not the title: recorded deeds, subdivision plats and easements for land near Little York are kept by the county Recorder of Deeds (in many counties the County Clerk and Recorder). Older tracts near Little York may trace back through a long string of deeds, so a title company is worth hiring on a real sale.
Quick answers
Can I see flood zones on the Warren County ArcGIS parcel map?
Good question; a flood layer may appear in the Warren County ArcGIS parcel map layer list, though it can lag behind FEMA's current panels.
Is AE a high-risk flood zone in Monmouth?
Short answer: both are high-risk zones, but only AE has a base flood elevation, which shapes building rules near Alexis.
Is Zone X safe from flooding for land near Roseville?
Good question; X zones around Kirkwood are lower risk, not no risk, and floods still happen outside high-risk zones.
What is a LOMA for land near Roseville?
It depends, but you can ask FEMA for a LOMA if surveyed elevations show the building near Roseville is above the BFE, and lenders accept the result.
Can I settle a boundary dispute with the map near Roseville?
No; boundary questions near Kirkwood need a licensed surveyor, so a fence may sit off the line
Open the official Warren 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.