Warren County parcel data

Parcel records for Warren County, Illinois: owners, assessed values, sales and boundaries.
Parcels
13,919
Last updated
Sep 9, 2026
Cities and towns
20
Zoning
Not yet

Cities and towns in Warren County

What each Warren County parcel record includes

  • Parcel number and boundary
  • Owners of record and mailing address
  • Assessed and market value
  • Most recent sale: price, date and deed
  • Lot size, land use and property class
  • Building: year built, area and units
  • Legal description
  • Zoning district
Example parcel · Warren County2.14 ac
Parcel number0651-45-8213
Owner of recordExample Holdings LLC
Market value 2026$486,300
Last sale$412,000 · 2021
Land useSingle family
Year built1998

Get Warren County parcels through the API

Search by address, owner, lot size, value or sale date.

Get an API keyRead the API docs 
curl -G 'https://api.placestack.com/v1/parcel' \
  -H "Authorization: Bearer $PLACESTACK_API_KEY" \
  --data-urlencode 'fips=17187'

Frequently asked questions

How many parcels are in Warren County?
Placestack has 13,919 parcel records for Warren County, Illinois.
What does a Warren County parcel record include?
The parcel number and boundary, owners of record and their mailing address, assessed and market value, the most recent sale, lot size, land use, the main building and the legal description.
Is Warren County zoning available?
Not yet for Warren County. Parcel records are available now.
How do I get Warren County parcel data?
Through the API, the MCP server or the map in the console.

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