St. Clair County
Parcel & Property Data
About This Data
LandBrief holds 10,936 parcel records for St. Clair 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 St. Clair County assessor roll dated June 2025, loaded August 2026. See data sources for every county’s vintage.
Explore St. Clair County
St. Clair County by the Numbers
- Median parcel size
- 7.4 acres
measured from mapped boundaries - 90th-percentile parcel
- 116.6 acres
- County land area
- 431,988 acres
U.S. Census measurement - Communities
- 12
63.7% of parcels outside any incorporated place - Out-of-state owners
- 9.2% of parcels
by owner mailing address
Who Owns St. Clair County?
Share of the county’s 10,936 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 | 78.1% |
| Companies & organizations | 8.1% |
| Trusts & estates | 10.7% |
| Government | 2.3% |
| Other / unclassified | 0.8% |
The largest owner on record is USA with 172 parcels — see the full landowner leaderboard.
Parcel Records (~10,936 total)
| Parcel ID | Owner | Address | City | Acreage |
|---|---|---|---|---|
| 07-3.1-05-000-000-004.00 | USA | S OF HENRY CO LINE | Unincorporated | 1417.20 |
| 07-2.1-04-000-000-001.00 | USA | S OF HENRY CO LINE | Unincorporated | 1331.80 |
| 07-1.1-01-000-000-001.00 | USA | S OF BENTON CO LN & SURR.BY OR | Unincorporated | 1314.20 |
| 06-1.1-01-000-000-003.00 | USA | CNTY RD | Unincorporated | 1170.20 |
| 07-3.1-06-000-000-001.00 | USA | W OF OR | Unincorporated | 1110.50 |
| 07-2.1-03-000-000-017.00 | USA | W OF CNTY RD | Unincorporated | 1104.10 |
| 05-3.1-06-000-000-001.00 | GURLEY ROGER G TRUST 1/2 INT LISA A GURLEY TRUST 1/2 INT | S OF HENRY CO LINE | Unincorporated | 745.30 |
| 07-1.1-02-000-000-001.00 | USA | S OF BENTON CO LN | Unincorporated | 740.00 |
| 07-9.0-31-000-000-001.00 | USA | LIES N&S OF OR | Unincorporated | 709.80 |
| 13-3.0-07-000-000-001.00 | STATE OF MISSOURI | N & W OF CNTY RDS | Unincorporated | 664.80 |
Download St. Clair County parcel data
All 10,936 parcels in St. Clair 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 St. Clair County?
The St. Clair County assessor roll on file records 10,936 parcels across 12 communities, with 63.7% lying outside any incorporated place.
Who owns the most land in St. Clair County?
USA holds 172 parcels, the most of any owner on record — the largest-landowners leaderboard ranks the top 25.
What is the typical parcel size in St. Clair County?
Measured from mapped boundaries, the median parcel is 7.4 acres, and nine parcels in ten are under 116.6 acres. Boundary-measured area closely tracks deeded acreage but is not the deed.
How much of St. Clair County is owned from out of state?
9.2% of parcels list an owner mailing address outside MO, per the county’s own records.
How much of St. Clair County is government-owned?
Government entities — federal, state, and local — hold 2.3% of the county’s parcels, classified from owner names on the roll.
How current is this data?
It comes from the St. Clair County assessor roll dated June 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 (12)
10,936 parcels across 12 communities in St. Clair County.