Illinois · FIPS 17199
Williamson County property records
The Williamson County file lists 32,396 properties as of the October 2026 edition, with columns for the owner, mailing address, estimated value, open loans and tax bill. Subscribe to this county alone, or as one of 5 in a bundle.
- Property records
- 32,396
- Rank in Illinois
- 22nd of 102
- Share of state records
- 0.7%
- Data as of
- Oct 2026
- FIPS code
- 17199
What the Williamson County file includes
32,396 rows, one per property, delivered as a CSV with these columns.
The parcel
- Situs address and ZIP
- Assessor parcel number (APN)
- County FIPS code
- Land use and property type
- Bedrooms, bathrooms, units
- Building and lot square feet
- Year built
The owner
- Owner name and second owner
- Mailing street, city, state, ZIP
- Owner-occupied or absentee
- Corporate owner flag
- Years owned and purchase date
The money
- Estimated value and equity
- Equity percent and loan-to-value
- Open liens and balance
- First lender and loan amount
- Assessed and market totals
- Tax amount and tax year
- Last sale date and price
The signals
- High equity
- Free and clear
- Pre-foreclosure
- Tax delinquent
- Vacant
Phone numbers and emails aren’t part of county files. Add them with skip tracing on Acquired Data.
Nearby Illinois counties
Williamson County, IL: questions and figures
- How many property records are there for Williamson County, Illinois?
- The October 2026 edition lists 32,396 properties in Williamson County, one row each.
- How does Williamson County compare with other Illinois counties?
- It ranks 22nd of 102 Illinois counties by record count and accounts for about 0.7% of the state's 4.9M records.
- What does the Williamson County file cost?
- $19 a month on its own, or bundle it with four other counties for $49 a month. Prices are launch proposals and are confirmed at checkout.
- What is the FIPS code for Williamson County, Illinois?
- 17199. Every row in the file carries it, which makes the data easy to join with census and other government datasets.
- How current is the Williamson County data?
- This page reflects the October 2026 edition. The national dataset is refreshed monthly and subscribers get each new edition of the county file.
Check one address first
Search a street address in Williamson County with its city or ZIP. Building details are open to all; a free account adds the owner and financial columns.
For example: · · ·