Williamson County, IL Parcels & GIS Data
Williamson County, IL parcel data: 51,048 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.
Land Records publishes Williamson County, Illinois parcel data covering 51,048 property records.
This page documents parcel-level coverage for Williamson County, Illinois. Each parcel record carries its boundary polygon (GIS geometry) along with attributes such as the parcel ID/APN, owner name and mailing address, situs (property) address, assessed land and improvement values, acreage, land-use and zoning codes, year built, and most recent sale price and date. Exact fill rates for Williamson County are listed in the attribute-coverage table below. Preview the data in the interactive explorer, or download the complete Williamson County property dataset.
Williamson County is a county in Illinois. At the 2020 census, it had a population of 67,153. Its largest city and county seat is Marion. Williamson County is part of the Metro Lakeland area of Southern Illinois.
Official county website: http://www.williamsoncountyil.gov/
The FIPS code for Williamson County is 17199.
Attribute coverage
Williamson County contains 51,048 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL).
| Column | Coverage | Records populated |
|---|---|---|
lrid | 100% | 51,048 |
parcelid | 100% | 51,029 |
parcelid2 | 100% | 51,029 |
ogparcelid | 100% | 51,029 |
ogparcelid2 | 100% | 51,029 |
parentid | <0.1% | 0 |
stackid | <0.1% | 0 |
geoid | 100% | 51,048 |
statefp | 100% | 51,048 |
countyfp | 100% | 51,048 |
countyname | 100% | 51,048 |
cousubfp | 100% | 51,048 |
cousubname | 100% | 51,048 |
tractce | 100% | 51,048 |
tractname | 100% | 51,048 |
taxacctnum | <0.1% | 0 |
taxyear | 100% | 51,036 |
taxdistrict | <0.1% | 0 |
usecode | 0.1% | 37 |
usedesc | 98.3% | 50,197 |
zoningcode | <0.1% | 0 |
zoningdesc | <0.1% | 0 |
numbldgs | 68.5% | 34,983 |
numunits | 63.4% | 32,339 |
yearbuilt | <0.1% | 0 |
numfloors | 41.2% | 21,033 |
bldgsqft | <0.1% | 0 |
bedrooms | <0.1% | 0 |
halfbaths | <0.1% | 0 |
fullbaths | <0.1% | 0 |
imprvalue | 98.3% | 50,170 |
landvalue | 98.3% | 50,170 |
agvalue | 98.3% | 50,170 |
totalvalue | 100% | 51,036 |
taxacres | <0.1% | 0 |
calcarea | 100% | 51,048 |
saleamt | 98.3% | 50,170 |
saledate | 82.0% | 41,851 |
ownertype | 98.3% | 50,185 |
ownername | 98.3% | 50,185 |
owneraddr | 98.3% | 50,170 |
ownercity | <0.1% | 0 |
ownerstate | <0.1% | 0 |
ownerzip | <0.1% | 0 |
parceladdr | 94.7% | 48,346 |
parcelcity | 94.6% | 48,304 |
parcelstate | 100% | 51,048 |
parcelzip | 100% | 51,048 |
legaldesc | 97.8% | 49,937 |
township | 91.1% | 46,506 |
section | 91.1% | 46,506 |
qtrsection | <0.1% | 0 |
range | 91.1% | 46,506 |
plssdesc | 91.1% | 46,506 |
book | 84.0% | 42,888 |
page | 84.0% | 42,889 |
block | 34.5% | 17,620 |
lot | 61.8% | 31,571 |
parceltype | 1.5% | 766 |
accesstype | 1.5% | 766 |
iucnclass | 0.8% | 389 |
placename | 5.2% | 2,632 |
placetype | 4.9% | 2,486 |
firmid | <0.1% | 0 |
firmdate | <0.1% | 0 |
fldzone | <0.1% | 0 |
zonesubty | <0.1% | 0 |
staticbfe | <0.1% | 0 |
elevmin | 100% | 51,048 |
elevmax | 100% | 51,048 |
elevavg | 100% | 51,048 |
fireplaces | <0.1% | 0 |
heating | <0.1% | 0 |
heatfuel | <0.1% | 0 |
cooling | <0.1% | 0 |
foundation | <0.1% | 0 |
roofcover | <0.1% | 0 |
siding | <0.1% | 0 |
bldgtype | <0.1% | 0 |
naicscode | 1.4% | 704 |
frsid | 0.3% | 150 |
dfrurl | 0.3% | 150 |
caapermit | 0.3% | 150 |
cwapermit | 0.3% | 150 |
rcrapermit | 0.3% | 150 |
updated | 100% | 51,048 |
centroidx | 100% | 51,048 |
centroidy | 100% | 51,048 |
surfpointx | 100% | 51,048 |
surfpointy | 100% | 51,048 |
geom | 100% | 51,048 |
extras | <0.1% | 0 |
ownerlist | <0.1% | 0 |
Neighboring counties
Parcel data for counties bordering Williamson County:
Frequently asked questions
Where can I find Williamson County, IL parcel and GIS data?
Land Records publishes a Williamson County, IL parcel dataset in which every parcel carries its boundary polygon (GIS geometry) along with ownership, assessed value, land use, acreage, and sale history. Preview it in the interactive explorer on this page, or download the full Williamson County, IL dataset as a GeoPackage or CSV.
How many parcels are in Williamson County, IL?
The current dataset contains 51,048 parcel records for Williamson County, IL, each with its boundary geometry and assessor attributes.
What is the FIPS code for Williamson County, IL?
The FIPS code for Williamson County, IL is 17199.
What information does each Williamson County, IL parcel record include?
Each Williamson County, IL parcel record includes the parcel ID/APN, owner name and mailing address, situs (property) address, assessed land and improvement values, acreage, land-use and zoning codes, year built, and the most recent sale price and date — plus the parcel boundary polygon. Per-attribute fill rates are listed in the coverage table on this page.
Is Williamson County, IL parcel data free?
You can preview Williamson County, IL parcels for free in the interactive explorer. The complete dataset is available as a one-time download or through the nationwide parcel web service; see the download options on this page for current pricing.
Does Williamson County, IL have an official GIS or property records website?
Yes — the official Williamson County, IL government website is linked in the county details above. Land Records standardizes Williamson County, IL assessor and recorder records into a single nationwide parcel schema with GIS boundary geometry.