Illinois parcel data
PropRaven serves 5,760,969 distinct parcels for Illinois across 90 counties at serving epoch 2026-08-28. Some Illinois parcels are currently attributed to more than one county in the serving database, so per-county totals are not published until that is corrected; the coverage rates below are statewide. 89.2% of those records carry a situs address, 77.0% a usable coordinate, 74.1% an owner name, 45.7% a total assessed value above zero and 19.8% a parcel polygon.
Coverage at a glance
- Distinct parcels
- 5,760,969
- Counties with data
- 90
- Situs address
- 89.2%6,408,281 records
- Geocoded
- 77.0%5,531,066 records
- Owner name
- 74.1%5,326,742 records
- Assessed value
- 45.7%3,284,230 records
- Parcel polygon
- 19.8%1,426,796 records
Illinois counties with parcel data
90 counties, largest first. Each county links to its own page with the full coverage table, field families and download options.
How to read this table
Parcels is the count of county-level parcel records in the serving epoch, exactly as the coverage summary stores it. A parcel a county source files more than once is counted once per record, which is why state totals across the site add up to more than the 191.3M distinct parcels PropRaven publishes nationally. Address is the share of records with a non-empty situs address and Geocoded the share with a usable coordinate; both are rounded down to one decimal. Population is the Census county population where the gazetteer carries one, so you can judge record counts against the size of the county — a dash means no population row exists for that code.
Counties are matched to the Census county gazetteer by FIPS code. Rows the coverage summary holds under codes that are not counties are left out, so the table lists real counties and county-equivalents only — parishes in Louisiana, boroughs and census areas in Alaska, and independent cities in Virginia, Maryland, Missouri and Nevada each get their own page.
What a Illinois parcel record contains
Every parcel record shares one schema nationally: owner name and mailing address, situs address, assessed and market value, sales and deed history, building permits, hazard and risk flags, and parcel geometry where the county publishes it. Which of those families is populated varies by county — the coverage columns above tell you how much of each is filled for Illinois, and the county pages break the same figures down further. The data dictionary documents every table and column.
Get Illinois parcel data
- Search Illinois parcelsFilter and browse parcels in the search tool — free tier, no card required.
- REST API and SDKsLook parcels up by ID, address or APN from TypeScript, Python or Go; 1,000 lookups a month free.
- MCP serverQuery the same records from Claude, ChatGPT, Cursor or any MCP-compatible agent.
- Snowflake MarketplaceTake the full dataset as a share into your own Snowflake account — no ETL.
- Bulk parcel dataBulk delivery for whole-state or national workloads.
Related
- · All states — the national coverage index.
- · Live coverage map — the same county summary drawn on a map.
- · Data overview — schema explorer, fill rates and sample records.