Mercer County, IL parcel data download

Download Mercer County, Illinois parcel data - 12,947 parcels with standardized boundaries and available property fields. Review county-specific completeness before checkout. Instant delivery in Shapefile, FileGDB, GeoPackage, GeoJSON & CSV. $100 per county.

Data freshness: Max assessed_last in public Mercer parcel layer; last loaded into LandAI on 2026-06-05.

Every purchase includes all five export formats (Shapefile, FileGDB, GeoPackage, GeoJSON & CSV), standardized to the LandAI parcel schema with WGS84 (EPSG:4326) geometry. After checkout you choose which formats to generate and download them for 45 days.

What's in the Mercer County dataset

Field completeness measured across 12,947 active parcels (Max assessed_last in public Mercer parcel layer; last loaded into LandAI on 2026-06-05):

FieldCoverage
Owner names100%
Site addresses76.9%
Owner mailing addresses99.8%
Deeded acres100%
Calculated (GIS) acres100%
Assessed total value94.1%
Market total value94.1%
Legal description100%

These are 8 of the 48 standardized fields in the LandAI parcel schema. Live per-field completeness for every field is shown on this page's interactive view.

Mercer County parcel data FAQ

How many parcels are in Mercer County, IL?

Mercer County, Illinois has 12,947 active parcels in the LandAI dataset (source data as of 2023-04-18).

What fields are included in Mercer County parcel data?

The dataset uses LandAI's standardized parcel schema. Field availability varies by source and record. Current measured completeness includes owner names (100%), site addresses (76.9%), owner mailing addresses (99.8%), deeded acres (100%), calculated (GIS) acres (100%), assessed total value (94.1%), market total value (94.1%), legal description (100%).

What formats can I download Mercer County parcel data in?

Shapefile, FileGDB, GeoPackage, GeoJSON & CSV. Every $100 county purchase includes all five formats; you choose which to generate after checkout and can re-download for 45 days.

How current is the Mercer County parcel data?

Max assessed_last in public Mercer parcel layer; last loaded into LandAI on 2026-06-05.

Does Mercer County parcel data include owner names?

100% of Mercer County parcels currently include a normalized owner name. Mailing-address coverage is measured and reported separately when the source provides it.

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