Johnson County
Parcel & Property Data
About This Data
LandBrief holds 12,620 parcel records for Johnson 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 Johnson County assessor roll dated July 2025, loaded August 2026. See data sources for every county’s vintage.
Explore Johnson County
Johnson County by the Numbers
- Median parcel size
- 2 acres
measured from mapped boundaries - 90th-percentile parcel
- 41.9 acres
- County land area
- 219,992 acres
U.S. Census measurement - Communities
- 13
52.8% of parcels outside any incorporated place - Out-of-state owners
- 8.4% of parcels
by owner mailing address
Who Owns Johnson County?
Share of the county’s 12,620 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 | 81.5% |
| Companies & organizations | 4.7% |
| Trusts & estates | 7.5% |
| Government | 3.0% |
| Other / unclassified | 3.3% |
The largest owner on record is CITY OF MARION with 82 parcels — see the full landowner leaderboard.
Parcel Records (~12,620 total)
| Parcel ID | Owner | Address | City | Acreage |
|---|---|---|---|---|
| 10-05-304-000 | SHAWNEE STONE LLC | 202 W MAIN ST | Unincorporated | 193.63 |
| 02-09-101-000 | SO ILL POWER COOP | 11543 LAKE OF EGYPT RD | Unincorporated | 126.00 |
| 01-12-202-000 | SO ILL POWER COOP | 11543 LAKE OF EGYPT RD | Unincorporated | 121.62 |
| 07-09-202-000 | STATE OF ILLINOIS DEPT OF NATURAL RESOURCES | ONE NATURAL RESOURCE | Unincorporated | 80.00 |
| 02-16-104-000 | SO ILL POWER CO0P | 11543 LAKE OF EGYPT RD | Unincorporated | 80.00 |
| 07-09-201-000 | STATE OF ILLINOIS DEPT OF NATURAL RESOURCES | ONE NATURAL RESOURCE | Unincorporated | 79.99 |
| 02-09-303-000 | SO ILL POWER COOP | 11543 LAKE OF EGYPT RD | Unincorporated | 72.50 |
| 01-02-201-000 | SO ILL POWER COOP | 11543 LAKE OF EGYPT RD | Unincorporated | 64.52 |
| 02-06-202-000 | SO ILL POWER COOP | 11543 LAKE OF EGYPT RD | Unincorporated | 52.00 |
| 02-06-402-000 | SO IL POWER COOP | 11543 LAKE OF EGYPT RD | Unincorporated | 49.97 |
Download Johnson County parcel data
All 12,620 parcels in Johnson County as a single file — free, no account needed. Shapefile, GeoJSON, GeoPackage, CSV and Parquet.
Get Johnson County on FreeParcelData →Nearby counties
Frequently Asked Questions
How many parcels are in Johnson County?
The Johnson County assessor roll on file records 12,620 parcels across 13 communities, with 52.8% lying outside any incorporated place.
Who owns the most land in Johnson County?
CITY OF MARION holds 82 parcels, the most of any owner on record — the largest-landowners leaderboard ranks the top 25.
What is the typical parcel size in Johnson County?
Measured from mapped boundaries, the median parcel is 2 acres, and nine parcels in ten are under 41.9 acres. Boundary-measured area closely tracks deeded acreage but is not the deed.
How much of Johnson County is owned from out of state?
8.4% of parcels list an owner mailing address outside IL, per the county’s own records.
How much of Johnson County is government-owned?
Government entities — federal, state, and local — hold 3.0% of the county’s parcels, classified from owner names on the roll.
How current is this data?
It comes from the Johnson 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 (13)
12,620 parcels across 13 communities in Johnson County.