Blog · October 14, 2026 · Illinois
Using the Monmouth Plat Map
Lots in Monmouth trace back to recorded plats filed with the county.
Main page: Warren County, IL GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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When a deed near Alexis says lot and block, look up the Monmouth plat map it refers to. What this Monmouth guide covers: where plats are filed, plat versus tax map, and the details that matter to buyers.
The Monmouth plat map: start here
For a lot in Monmouth, look for the plat book reference on the parcel record; that makes the request quick.
The free map to start with
Your first stop is the Warren County ArcGIS parcel map; it includes every tax parcel around Alexis and Little York. For a tract near Little York, enter a street address, an owner's name or a parcel number, then pick the result to center the map on it. Out toward Little York, the record panel usually lists the owner of record, assessed acreage, a parcel ID and often a sale date.
When a parcel crosses a boundary
Warren County borders Fulton County, Henderson County, Knox County, McDonough County, and Mercer County, all with their own assessor records. Ground near Little York that runs to the line may be split in two county records, so check the adjacent map as well. For land near Little York, our state page lists each neighboring county map across Illinois.
Monmouth, IL: the basics
Monmouth sits in Warren County, Illinois, so its parcels are on the county's map. As the county seat, Monmouth hosts the courthouse, handy when you need recorded documents. For property near Alexis, the municipality handles things like zoning, permits and utilities within town limits, and the county still keeps the parcel and deed records. Lots just outside the town limits near Roseville often follows county rules, not municipal ones.
Land outside a subdivision
Rural land near Little York that was never subdivided may have no plat at all; look for a recorded survey for land near Kirkwood.
What the map can't tell you
The acreage figure is an estimate; just a licensed surveyor sets the real lines on land around Kirkwood. For property near Kirkwood, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Plat map vs. parcel map
The Warren County ArcGIS parcel map draws parcels for taxes, whereas the plat carries surveyed dimensions.
Getting answers from the right desk
Questions about value or the owner field for land near Little York go to the Supervisor of Assessments, working with township assessors, which maintains the tax roll. Questions about what you can build around Little York are for the local planning and health departments, town or county, depending on location.
Places you'll see on the map
Monmouth serves as the county seat, which is where the courthouse records live. Other places on the map include Kirkwood, Little York, Alexis, and Roseville. Around 16,185 people live in Warren County (Census estimate, 2023) spread over roughly 542 square miles. Warren County was formed in 1825, so old deeds can run back a long way.
What a plat shows
In and around Little York, the sheet usually includes lot and block numbers, dimensions and bearings, street rights-of-way and easements.
Sections, lots and bearings
Illinois follows 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, and a township holds 36 of them, though real sections near Little York vary in size. Copy the legal description from the record for the parcel near Alexis for any title or survey request.
Field tips
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Alexis, but coverage can be spotty out of town. A printout of the tract near Little York is a good backup.
Recorded documents worth pulling
The map is an index, not the title: recorded deeds, plats and easements covering ground around Alexis sit with the county Recorder of Deeds (in many counties the County Clerk and Recorder). Out toward Kirkwood, have ready the instrument number listed on the parcel record so staff can find the deed fast.
When a plat changes
An amended plat may change lots around Little York, search the index for replats of the same subdivision; street vacations near Alexis show up in the records too.
Ordering the Monmouth plat map
For a tract near Little York, some counties put plat images online, otherwise call or visit with the reference; small fees are common.
Questions about the Monmouth plat map
How do I split a lot in Monmouth?
Good question; lot splits in the town go through the planning office, at least around Kirkwood.
Who has recorded plats for land near Alexis?
Short answer: recorded plats near Little York are filed with the county Recorder of Deeds (in many counties the County Clerk and Recorder); use the plat reference from the deed or parcel record.
How is a plat different from the parcel map near Little York?
Good question; the plat near Alexis is recorded, while the GIS layer is an approximation; a surveyor ties it to the ground.
What do the dashed lines on a plat mean around Roseville?
Short answer: building on an easement near Alexis is generally restricted; ask planning staff if unsure.
What's a legal description around Alexis?
For a home near Kirkwood, Deeds use lot and block, metes and bounds or survey descriptions; copy it for any survey or title request.
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.