Union County
Parcel & Property Data
About This Data
LandBrief holds 12,525 parcel records for Union 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 Union County assessor roll dated July 2025, loaded August 2026. See data sources for every county’s vintage.
Explore Union County
Union County by the Numbers
- Median parcel size
- 2 acres
measured from mapped boundaries - 90th-percentile parcel
- 56.1 acres
- County land area
- 264,583 acres
U.S. Census measurement - Communities
- 14
22.3% of parcels outside any incorporated place - Out-of-state owners
- 5.1% of parcels
by owner mailing address
Who Owns Union County?
Share of the county’s 12,525 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 | 80.3% |
| Companies & organizations | 6.9% |
| Trusts & estates | 7.1% |
| Government | 4.2% |
| Other / unclassified | 1.4% |
The largest owner on record is USA with 155 parcels — see the full landowner leaderboard.
Parcel Records (~12,525 total)
| Parcel ID | Owner | Address | City | Acreage |
|---|---|---|---|---|
| 14-00-10-867 | TOMAS SALVADOR | 75 E OLIVE ST | Alto Pass | 0.13 † |
| 14-00-10-953-1 | STONE BRIAN LEWIS | 105 E PINE ST | Alto Pass | 0.22 † |
| 14-00-10-935 | STONE BRIAN | 106 E PINE ST | Alto Pass | 0.15 † |
| 14-00-10-933 | MYERS KEVIN | 110 E PINE ST | Alto Pass | 0.15 † |
| 14-00-10-952 | CAST GLADYS | 115 E PINE ST | Alto Pass | 0.07 † |
| 14-00-10-957-A | HAND JACOB T | 45 E PINE ST | Alto Pass | 0.15 † |
| 14-00-10-932 | ME HOMES LLC | 70 E PINE ST | Alto Pass | 0.15 † |
| 07-20-05-452 | U S FOREST SERVICE DEPT OF AG | 50 HWY 145 S | Unincorporated | 20.22 † |
| 10-01-06-635-B | USA | 50 HWY 145 S | Unincorporated | 17.78 † |
| 10-02-06-643 | USA | 50 HWY 145 S | Unincorporated | 51.38 † |
Download Union County parcel data
All 12,525 parcels in Union County as a single file — free, no account needed. Shapefile, GeoJSON, GeoPackage, CSV and Parquet.
Get Union County on FreeParcelData →Nearby counties
Frequently Asked Questions
How many parcels are in Union County?
The Union County assessor roll on file records 12,525 parcels across 14 communities, with 22.3% lying outside any incorporated place.
Who owns the most land in Union County?
USA holds 155 parcels, the most of any owner on record — the largest-landowners leaderboard ranks the top 25.
What is the typical parcel size in Union County?
Measured from mapped boundaries, the median parcel is 2 acres, and nine parcels in ten are under 56.1 acres. Boundary-measured area closely tracks deeded acreage but is not the deed.
How much of Union County is owned from out of state?
5.1% of parcels list an owner mailing address outside IL, per the county’s own records.
How much of Union County is government-owned?
Government entities — federal, state, and local — hold 4.2% of the county’s parcels, classified from owner names on the roll.
How current is this data?
It comes from the Union 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 (14)
12,525 parcels across 14 communities in Union County.