LandBrief

St. Louis County

Parcel & Property Data

528,122Total Parcels
—Avg. Market Value
230,181Total Acres

About This Data

LandBrief holds 528,122 parcel records for St. Louis 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. Louis County assessor roll dated June 2025, loaded August 2026. See data sources for every county’s vintage.

Explore St. Louis County

St. Louis County by the Numbers

Median parcel size
0.20 acres
measured from mapped boundaries
90th-percentile parcel
1 acres
County land area
325,117 acres
U.S. Census measurement
Communities
100
0.5% of parcels outside any incorporated place
Out-of-state owners
5.8% of parcels
by owner mailing address

Who Owns St. Louis County?

Share of the county’s 528,122 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
Individuals74.7%
Companies & organizations14.8%
Trusts & estates8.9%
Government1.0%
Other / unclassified0.5%

The largest owner on record is LRA with 8,978 parcels — see the full landowner leaderboard.

Parcel Records (~528,122 total)

per page
Parcel IDOwnerAddressCityAcreage
07C610021STATE OF MISSOURI12600 COLUMBIA BOTTOM RDSaint Louis3858.40
21X420015STATE OF MISSOURI150 CEDAR DRSaint Louis2133.73
02J510016STATE OF MISSOURI1 PELICAN ISLAND DRUnincorporated1975.90
28S240013AT&T WIRELESS LESSEE202 LEWIS RDEureka1961.91
28S440015WASHINGTON UNIVERSITY139 N OUTER RDEureka1905.12
19H111397ULMER JAN6314 S ROSEBURY AVE 2ESaint Louis1768.00
25R631828MILLER MICHAEL & CAROLYN T/E1329 STONE RUN DRBallwin1565.00
27W410024ST LOUIS COUNTY4250 ALLENTON RDPacific1418.57
28X230031STATE OF MISSOURI4380 FOX CREEK RDPacific1387.09
25W440021STATE OF MISSOURI ROCKWOODS RESERVATION2751 GLENCOE RDGlencoe1382.01
Page 1 of 52813

Nearby counties

Frequently Asked Questions

How many parcels are in St. Louis County?

The St. Louis County assessor roll on file records 528,122 parcels across 100 communities, with 0.5% lying outside any incorporated place.

Who owns the most land in St. Louis County?

LRA holds 8,978 parcels, the most of any owner on record — the largest-landowners leaderboard ranks the top 25.

What is the typical parcel size in St. Louis County?

Measured from mapped boundaries, the median parcel is 0.20 acres, and nine parcels in ten are under 1 acres. Boundary-measured area closely tracks deeded acreage but is not the deed.

How much of St. Louis County is owned from out of state?

5.8% of parcels list an owner mailing address outside MO, per the county’s own records.

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

Government entities — federal, state, and local — hold 1.0% of the county’s parcels, classified from owner names on the roll.

How current is this data?

It comes from the St. Louis 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 (100)

528,122 parcels across 100 communities in St. Louis County.