Grundy County

Parcel & Property Data

27,437Total Parcels

—Avg. Market Value

276,147Total Acres

About This Data

LandBrief holds 27,437 parcel records for Grundy 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 Grundy County assessor roll dated July 2025, loaded August 2026. See data sources for every county’s vintage.

Explore Grundy County

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

Grundy County by the Numbers

Median parcel size: 0.34 acres
measured from mapped boundaries
90th-percentile parcel: 30.8 acres
County land area: 267,602 acres
U.S. Census measurement
Communities: 22
17.9% of parcels outside any incorporated place
Out-of-state owners: 5.0% of parcels
by owner mailing address

Who Owns Grundy County?

Share of the county’s 27,437 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	69.7%
Companies & organizations	13.3%
Trusts & estates	12.8%
Government	2.4%
Other / unclassified	1.7%

The largest owner on record is COMMONWEALTH EDISON COMPANY with 192 parcels — see the full landowner leaderboard.

Parcel Records (~27,437 total)

Showper page

Parcel ID	Owner	Address	City	Acreage
10-27-100-001	1954 TUW SCULLY PETER D SCULLY MERIDA J & SCULLY N	10385 S BUFFALO RD	Unincorporated	640.00
10-26-100-001	1954 TUW SCULLY PETER D SCULLY MERIDA J & NADINE G	10575 S VERONA RD	Unincorporated	640.00
10-35-100-003	1954 TUW SCULLY PETER D SCULLY MERIDA J & NADINE G	11815 S VERONA RD	Unincorporated	640.00
10-34-100-001	1954 TUW SCULLY PETER D SCULLY MERIDA J & SCULLY N	—	Unincorporated	640.00
11-25-200-001	1954 TUW SCULLY PETER D SCULLY MERIDA J & SCULLY N	NO SITE ADDRESS	Unincorporated	615.19
11-25-200-001	1954 TUW SCULLY PETER D SCULLY MERIDA J & SCULLY N	NO SITE ADDRESS	Unincorporated	615.19
11-24-100-001	1954 TUW SCULLY PETER D SCULLY MERIDA J & SCULLY N	2220 E STONEWALL RD	Gardner	605.98
12-19-200-003	1954 TUW SCULLY PETER D SCULLY MERIDA J & SCULLY N	3620 E STONEWALL RD	Gardner	603.66
06-09-100-001	IL DEPT OF NATURAL RESOURCES	—	Unincorporated	590.00
12-12-100-001	SO WILMINGTON FIREMAN PARK &	7910 E RICE RD	Unincorporated	586.70

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All 27,437 parcels in Grundy 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 Grundy County?

The Grundy County assessor roll on file records 27,437 parcels across 22 communities, with 17.9% lying outside any incorporated place.

Who owns the most land in Grundy County?

COMMONWEALTH EDISON COMPANY holds 192 parcels, the most of any owner on record — the largest-landowners leaderboard ranks the top 25.

What is the typical parcel size in Grundy County?

Measured from mapped boundaries, the median parcel is 0.34 acres, and nine parcels in ten are under 30.8 acres. Boundary-measured area closely tracks deeded acreage but is not the deed.

How much of Grundy 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 Grundy County is government-owned?

Government entities — federal, state, and local — hold 2.4% of the county’s parcels, classified from owner names on the roll.

How current is this data?

It comes from the Grundy 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.