Union County
Parcel & Property Data
About This Data
LandBrief holds 30,691 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 May 2023, 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
- 45.7 acres
- County land area
- 665,003 acres
U.S. Census measurement - Communities
- 12
58.6% of parcels outside any incorporated place - Median assessed value
- $10,900
96% of parcels carry a value
Who Owns Union County?
Share of the county’s 30,691 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 | 73.6% |
| Companies & organizations | 19.1% |
| Trusts & estates | 3.8% |
| Government | 1.1% |
| Other / unclassified | 2.4% |
The largest owner on record is WEYERHAEUSER COMPANY with 533 parcels — see the full landowner leaderboard.
Parcel Records (~30,691 total)
| Parcel ID | Owner | Address | City | Acreage | Market Value |
|---|---|---|---|---|---|
| 00000-13658-0000 | WEYERHAEUSER COMPANY | — | Unincorporated | 640.00 | $105,350 |
| 00000-09386-0000 | AMERICAN FOREST FOUNDATION | — | Unincorporated | 640.00 | — |
| 00000-09651-0000 | WEYERHAEUSER COMPANY | — | Unincorporated | 640.00 | $80,100 |
| 00000-09307-0000 | U S A | — | Unincorporated | 640.00 | — |
| 00000-23920-0000 | NATURAL RESOURCES INC. | — | Unincorporated | 640.00 | $104,400 |
| 00000-23933-0000 | MAHONY CORPORATION | — | Unincorporated | 640.00 | $112,200 |
| 00000-17440-0000 | HORTON & BROYLES | 17440 | Unincorporated | 640.00 | $84,150 |
| 00000-16544-0000 | DELTIC TIMBER CORPORATION | — | Unincorporated | 640.00 | $107,450 |
| 00000-10783-0000 | WEYERHAEUSER COMPANY | — | Unincorporated | 640.00 | $99,450 |
| 00000-10638-0000 | WEYERHAEUSER COMPANY | — | Unincorporated | 640.00 | $93,450 |
Download Union County parcel data
All 30,691 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 30,691 parcels across 12 communities, with 58.6% lying outside any incorporated place.
Who owns the most land in Union County?
WEYERHAEUSER COMPANY holds 533 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 45.7 acres. Boundary-measured area closely tracks deeded acreage but is not the deed.
How much of Union County is government-owned?
Government entities — federal, state, and local — hold 1.1% 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 May 2023. 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 (12)
30,691 parcels across 12 communities in Union County.