LandBrief

St. Clair County

Parcel & Property Data

77,517Total Parcels
—Avg. Market Value
453,922Total Acres

About This Data

LandBrief holds 77,517 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
0.68 acres
measured from mapped boundaries
90th-percentile parcel
11.5 acres
County land area
461,761 acres
U.S. Census measurement
Communities
30
39.4% of parcels outside any incorporated place
Out-of-state owners
2.3% of parcels
by owner mailing address

Who Owns St. Clair County?

Share of the county’s 77,517 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 typeShare of parcels
Individuals81.2%
Companies & organizations8.3%
Trusts & estates8.4%
Government1.6%
Other / unclassified0.4%

The largest owner on record is DEPARTMENT OF NATURAL RESOURCES with 407 parcels — see the full landowner leaderboard.

Parcel Records (~77,517 total)

per page
Parcel IDOwnerAddressCityAcreage
74148380001000DEPARTMENT OF NATURAL RESOURCESCOLUMBINE STHarsens Island3067.86
74220211002000DETROIT EDISON CO7500 KILGORE RDUnincorporated1767.27
74140510001000MI DEPT OF NATURAL RESOURCES9200 NORTH RIVER RDUnincorporated697.70
74250351006003SCC AIRPORT275 AIRPORT DR PRT AIRPORTUnincorporated668.16
74260201002000KONING DONALD J TRUST7270 MARTIN RDImlay City635.65
74149370001000DEPARTMENT OF NATURAL RESOURCESGOOSE BAYUnincorporated627.29
74130131001100DETROIT EDISON CO4505 BELLE RIVERUnincorporated551.40
74150081001000SCOFIELD RALPH/CAMPBELL T5330 GLYSHAW RDNorth Street520.47
74130122005000DETROIT EDISON CO3622 RANGE RDUnincorporated508.34
74140301001000MI DEPT OF NATURAL RESOURCES8200 MACOMB RDUnincorporated492.55
Page 1 of 7752

Download St. Clair County parcel data

All 77,517 parcels in St. Clair County as a single file — free, no account needed. Shapefile, GeoJSON, GeoPackage, CSV and Parquet.

Get St. Clair County on FreeParcelData →

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Frequently Asked Questions

How many parcels are in St. Clair County?

The St. Clair County assessor roll on file records 77,517 parcels across 30 communities, with 39.4% lying outside any incorporated place.

Who owns the most land in St. Clair County?

DEPARTMENT OF NATURAL RESOURCES holds 407 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 0.68 acres, and nine parcels in ten are under 11.5 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?

2.3% of parcels list an owner mailing address outside MI, per the county’s own records.

How much of St. Clair County is government-owned?

Government entities — federal, state, and local — hold 1.6% 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 (30)

77,517 parcels across 30 communities in St. Clair County.