Madison County

Parcel & Property Data

135,775Total Parcels

—Avg. Market Value

410,037Total Acres

About This Data

LandBrief holds 135,775 parcel records for Madison County, sourced from county records. Each includes the parcel boundary, and — where the county publishes them — owner, situs address, acreage, assessed values and legal description.

Data from the Madison County assessor roll dated July 2025, loaded August 2026. See data sources for every county’s vintage.

Explore Madison County

Largest landownersWho holds the most land in Madison County, by total acreage.
Largest parcelsThe biggest individual tracts in the county, ranked by size.
Out-of-state ownersWho owns Madison County from somewhere else, and where they live.

Madison County by the Numbers

Median parcel size: 0.28 acres
measured from mapped boundaries
90th-percentile parcel: 4.5 acres
County land area: 457,932 acres
U.S. Census measurement
Communities: 46
5.6% of parcels outside any incorporated place
Out-of-state owners: 5.0% of parcels
by owner mailing address

Who Owns Madison County?

Share of the county’s 135,775 parcels by the kind of owner on record. Classified from owner names, so the boundaries are approximate; an entity the rules cannot place counts as an individual.

Owner type	Share of parcels
Individuals	75.2%
Companies & organizations	11.5%
Trusts & estates	8.1%
Government	2.6%
Other / unclassified	2.6%

The largest owner on record is MADISON COUNTY TRUSTEE with 787 parcels — see the full landowner leaderboard.

Parcel Records (~135,775 total)

Showper page

Parcel ID	Owner	Address	City	Acreage
21-1-19-03-00-000-001	—	OLD ROCK RD	Granite City	659.00
19-1-08-35-00-000-001	WRB REFINING LLC	915 STATE ROUTE 111	Roxana	610.24
17-1-20-01-00-000-001	GASS FARMS LAND TRUST	INTS ST APT 255	Unincorporated	500.68
21-1-19-11-00-000-002	DEPT OF NATURAL RESOURCES	OLD ROCK RD	Granite City	486.10
19-1-08-36-00-000-002	WRB REFINING LLC	1809 MADISON AVE	Roxana	476.79
18-1-14-28-00-000-001	AMEREN DEVELOPMENT COMPANY	FRANKO LN	Granite City	429.16
14-1-15-16-00-000-001	SIUE BOARD OF TRUSTEES	35 CIRCLE DR	Edwardsville	415.56
22-1-20-20-00-000-004.001	UNITED STATES STEEL CORP	3282 GUY LAWRENCE WAY	Granite City	389.39
06-1-17-07-00-000-002	BECKER RUSSELL W AND DON L	4153 STATE ROUTE 4	Unincorporated	350.81
15-1-09-02-00-000-001	GODDARD PASCAL H AND SAMUEL P	6502 MORO RD	Edwardsville	324.79

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All 135,775 parcels in Madison County as a single file — free, no account needed. Shapefile, GeoJSON, GeoPackage, CSV and Parquet.

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Frequently Asked Questions

How many parcels are in Madison County?

The Madison County assessor roll on file records 135,775 parcels across 46 communities, with 5.6% lying outside any incorporated place.

Who owns the most land in Madison County?

MADISON COUNTY TRUSTEE holds 787 parcels, the most of any owner on record — the largest-landowners leaderboard ranks the top 25.

What is the typical parcel size in Madison County?

Measured from mapped boundaries, the median parcel is 0.28 acres, and nine parcels in ten are under 4.5 acres. Boundary-measured area closely tracks deeded acreage but is not the deed.

How much of Madison County is owned from out of state?

5.0% of parcels list an owner mailing address outside IL, per the county’s own records.

How much of Madison County is government-owned?

Government entities — federal, state, and local — hold 2.6% of the county’s parcels, classified from owner names on the roll.

How current is this data?

It comes from the Madison County assessor roll dated July 2025. Counties deliver on their own schedules; the methodology page explains how records are processed and the data sources page tracks every county’s vintage.

Browse by City (46)

135,775 parcels across 46 communities in Madison County.