Blog · October 14, 2026 · Illinois
Rock Island Plat Map, Illinois: plats and lots
Lots in Rock Island trace back to recorded plats filed with the county.
Main page: Rock Island 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.
When a listing near Moline mentions a lot number, the Rock Island plat map is where those numbers come from. Covered here for Rock Island: where to request a copy, plat versus tax map, and what to look for on the sheet.
The Rock Island plat map: start here
For a lot in Rock Island, the deed or parcel record often names the subdivision and plat reference; use it to request a copy.
Opening the official parcel viewer
Begin with the Rock Island County parcel viewer; it covers every assessed parcel from Milan to Andalusia. For land near Oak Grove, enter a street address, an owner's name or a parcel number, then pick the result to center the map on it. If you're looking near Carbon Cliff, the parcel card usually lists the owner of record, acreage on the tax roll, the parcel number and in many cases the last transfer.
Amended plats
An amended plat may change lots around Milan, search the index for replats of the same subdivision; vacated streets or alleys also get recorded.
City limits and county records
Rock Island lies within Rock Island County, Illinois, which means parcel data comes from the county. As the county seat, Rock Island hosts the courthouse, handy when you need recorded documents. Out toward Milan, the municipality handles matters such as zoning, permits and utilities for lots inside the boundary, but the county runs assessment and recording. Acreage past the town limits toward Andalusia often follows county rules instead.
Plat map vs. parcel map
The Rock Island County parcel viewer draws parcels for taxes, while the recorded plat is the legal document.
Where the recorded documents are
Before you sign anything, pull the recorded deed from the county Recorder of Deeds (in many counties the County Clerk and Recorder); the parcel map near Andalusia only summarizes it. For property near Andalusia, have ready the instrument number listed on the parcel record so staff can find the deed fast.
What a plat shows
For property near Andalusia, the sheet usually includes lot and block numbers, dimensions and bearings, street rights-of-way and easements.
Getting your bearings
The city holds the county offices, where most land records are kept for land near Coal Valley. You'll also find Milan, Oak Grove, Moline, and Andalusia. Roughly 141,236 people call Rock Island County home (Census estimate, 2023) spread over some 427 square miles. Rock Island County dates to 1831, and some chains of title near Milan are long. Features like Upper Mississippi River National Wildlife and Fish Refuge help you orient on the aerial around Andalusia.
Metes and bounds instead
Acreage around Milan outside a subdivision is often described by metes and bounds or survey description; look for a recorded survey for land near Oak Grove.
Taking the map into the field
Most viewers work in a phone browser, which helps when you're standing on land near Oak Grove, though signal can drop in rural spots. A saved image of the lot near Milan and its lines helps when you meet an owner or agent.
Land on the county line
Rock Island County meets Henry County, Mercer County, Whiteside County, Clinton County, IA, and Louisa County, IA; every one of them runs a separate parcel map. A tract near the line by Carbon Cliff may show up in two county records, so open the adjacent map as well. Near Moline, the Platbookmapper state page lists each bordering county map across Illinois.
Who handles what
Recorded documents for a parcel near Andalusia are with the county Recorder of Deeds (in many counties the County Clerk and Recorder), often with an online index. Questions about what you can build around Moline need the planning or permitting office, depending on whether the land is inside town limits.
How land is described here
Illinois follows the Public Land Survey System, so deeds around Carbon Cliff reference sections and townships. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though real sections near Milan vary in size. Write down the legal description for the tract near Andalusia when you talk to a surveyor.
Ordering the Rock Island plat map
If the land is near Carbon Cliff, many recorder offices offer an online index, otherwise call or visit with the reference; copy fees are usually small.
Limits of the parcel data
Listed acreage is a tax-roll number; just a licensed surveyor establishes the real boundary on land around Moline. For a parcel near Milan, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Rock Island: common questions
Can I build on an easement in Rock Island?
Building on an easement near Milan is generally restricted; read the plat notes.
What is a lot and block description in Rock Island?
Near Moline, lot and block refer to a numbered lot within a block on a recorded subdivision plat, so pull that plat for dimensions.
What is a replat in Rock Island?
Usually, combining or splitting lots near Oak Grove usually needs a recorded plat change.
How do I get a copy of a plat near Moline?
For most people, recorded plats near Oak Grove are filed with the county Recorder of Deeds (in many counties the County Clerk and Recorder).
Can I settle a boundary dispute with the map near Silvis?
No; boundary questions near Silvis need a licensed surveyor, so a fence may sit off the line
Open the official Rock Island 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.