Marion County
Parcel & Property Data
About This Data
LandBrief holds 15,840 parcel records for Marion 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 Marion County assessor roll dated July 2026, loaded August 2026. See data sources for every county’s vintage.
Explore Marion County
Marion County by the Numbers
- Median parcel size
- 0.46 acres
measured from mapped boundaries - 90th-percentile parcel
- 60.5 acres
- County land area
- 279,636 acres
U.S. Census measurement - Communities
- 5
36.9% of parcels outside any incorporated place
Who Owns Marion County?
Share of the county’s 15,840 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 | 77.1% |
| Companies & organizations | 11.9% |
| Trusts & estates | 9.2% |
| Government | 0.5% |
| Other / unclassified | 1.2% |
The largest owner on record is HANNIBAL, CITY OF with 330 parcels — see the full landowner leaderboard.
Parcel Records (~15,840 total)
| Parcel ID | Owner | Address | City | Acreage |
|---|---|---|---|---|
| 0080515000001000 | BASF CORPORATION TAX DEPT | RT. JJ | Unincorporated | 539.55 |
| 0040210000002000 | GUARINO, ANTHONY I. & FLORENCE | 645 HWY D | Unincorporated | 494.00 |
| 0080624000002000 | BLEIGH CONSTRUCTION COMPANY | CO RD 185 | Unincorporated | 482.00 |
| 0050624000003000 | MASTERSON, JAMES RICHARD | 3940 CO RD 189 | Unincorporated | 481.68 |
| 0110209000001000 | MIKE & DONNA, LLC | HWY 61 | Unincorporated | 476.00 |
| 0140833000001000 | SPALDING FARMS, LLC | CO RD 214 | Unincorporated | 473.00 |
| 0080614000002000 | BASF CORPORATION TAX DEPT. | HWY JJ | Unincorporated | 473.00 |
| 0010305000001000 | HOFMEISTER, ROBERT 1/2; | HWY 24 | Unincorporated | 456.30 |
| 0140101000002000 | BATES, WILLIAM GENE & LORA E. | 2381 HWY. C | Unincorporated | 456.00 |
| 0080736000001000 | STEWART, MARK L & IRENE | CO. RD. 408 | Unincorporated | 455.90 |
Download Marion County parcel data
All 15,840 parcels in Marion County as a single file — free, no account needed. Shapefile, GeoJSON, GeoPackage, CSV and Parquet.
Get Marion County on FreeParcelData →Nearby counties
Frequently Asked Questions
How many parcels are in Marion County?
The Marion County assessor roll on file records 15,840 parcels across 5 communities, with 36.9% lying outside any incorporated place.
Who owns the most land in Marion County?
HANNIBAL, CITY OF holds 330 parcels, the most of any owner on record — the largest-landowners leaderboard ranks the top 25.
What is the typical parcel size in Marion County?
Measured from mapped boundaries, the median parcel is 0.46 acres, and nine parcels in ten are under 60.5 acres. Boundary-measured area closely tracks deeded acreage but is not the deed.
How much of Marion County is government-owned?
Government entities — federal, state, and local — hold 0.5% of the county’s parcels, classified from owner names on the roll.
How current is this data?
It comes from the Marion County assessor roll dated July 2026. 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 (5)
15,840 parcels across 5 communities in Marion County.