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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.

FIPS 17199

Official county website: http://www.williamsoncountyil.gov/

The FIPS code for Williamson County is 17199.

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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).

ColumnCoverageRecords populated
lrid100%51,048
parcelid100%51,029
parcelid2100%51,029
ogparcelid<0.1%0
ogparcelid2<0.1%0
parentid<0.1%0
stackid<0.1%0
geoid100%51,048
statefp100%51,048
countyfp100%51,048
countyname100%51,048
cousubfp100%51,048
cousubname100%51,048
tractce100%51,048
tractname100%51,048
taxacctnum<0.1%0
taxyear100%51,036
taxdistrict<0.1%0
usecode0.1%37
usedesc98.3%50,197
zoningcode<0.1%0
zoningdesc<0.1%0
numbldgs64.2%32,781
numunits62.8%32,078
yearbuilt<0.1%0
numfloors41.2%21,033
bldgsqft<0.1%0
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue98.3%50,170
landvalue98.3%50,170
agvalue98.3%50,170
totalvalue100%51,036
taxacres<0.1%0
calcarea100%51,048
saleamt98.3%50,170
saledate82.0%41,851
ownertype<0.1%0
ownername98.3%50,185
owneraddr98.3%50,170
ownercity<0.1%0
ownerstate<0.1%0
ownerzip<0.1%0
parceladdr66.1%33,760
parcelcity0.1%31
parcelstate100%51,036
parcelzip<0.1%11
legaldesc97.8%49,937
township91.1%46,506
section91.1%46,506
qtrsection<0.1%0
range91.1%46,506
plssdesc91.1%46,506
book84.0%42,888
page84.0%42,889
parceltype1.5%766
accesstype1.5%766
iucnclass0.8%389
placename1.8%908
placetype1.5%766
firmid<0.1%0
firmdate<0.1%0
fldzone<0.1%0
zonesubty<0.1%0
staticbfe<0.1%0
elevmin100%51,048
elevmax100%51,048
elevavg100%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
updated100%51,048
centroidx100%51,048
centroidy100%51,048
surfpointx100%51,048
surfpointy100%51,048
geom100%51,048
lrversion100%51,048

Neighboring counties

Parcel data for counties bordering Williamson County:

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Attribute coverageNeighboring countiesRelated