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Winnebago County, IL Parcels & GIS Data

Winnebago County, IL parcel data: 124,498 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Winnebago County, Illinois parcel data covering 124,498 property records.

This page documents parcel-level coverage for Winnebago 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 Winnebago County are listed in the attribute-coverage table below. Preview the data in the interactive explorer, or download the complete Winnebago County property dataset.

Winnebago County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 285,350 making it the seventh most populous county in Illinois behind Cook County and its five surrounding collar counties. Its county seat is Rockford.

FIPS 17201

Official county website: https://wincoil.gov

The FIPS code for Winnebago County is 17201.

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Attribute coverage

Winnebago County contains 124,498 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL). For the LBCS columns, only real classifications count: the to-be-determined and not-applicable placeholder codes are excluded.

ColumnCoverageRecords populated
lrid100%124,498
parcelid100%124,498
parcelid286.0%107,081
ogparcelid100%124,498
ogparcelid286.0%107,038
parentid<0.1%0
stackid<0.1%0
geoid100%124,498
statefp100%124,498
countyfp100%124,498
countyname100%124,498
cousubfp100%124,498
cousubname100%124,498
tractce100%124,498
tractname100%124,498
taxacctnum<0.1%0
taxyear100%124,498
taxdistrict<0.1%0
usecode<0.1%0
usedesc36.6%45,614
zoningcode3.9%4,872
zoningdesc3.9%4,872
numbldgs47.9%59,668
numunits0.2%220
yearbuilt<0.1%0
numfloors0.2%220
bldgsqft<0.1%0
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue<0.1%0
landvalue<0.1%0
agvalue<0.1%0
totalvalue<0.1%0
taxacres95.6%119,055
calcarea100%124,498
saleamt<0.1%0
saledate<0.1%0
ownertype100%124,483
ownername100%124,483
owneraddr100%124,487
ownercity100%124,489
ownerstate100%124,487
ownerzip100%124,485
parceladdr100%124,472
parcelcity100%124,492
parcelstate100%124,498
parcelzip100%124,498
legaldesc100%124,498
township100%124,494
section100%124,494
qtrsection100%124,494
range100%124,494
plssdesc100%124,494
book<0.1%0
page<0.1%0
block<0.1%0
lot<0.1%0
parceltype0.1%155
accesstype0.8%1,017
iucnclass0.4%436
placename5.3%6,553
placetype5.2%6,476
firmid100%124,498
firmdate100%124,498
fldzone100%124,498
zonesubty97.7%121,650
staticbfe<0.1%9
elevmin99.7%124,072
elevmax99.7%124,072
elevavg99.7%124,072
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
naicscode5.8%7,224
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated99.7%124,085
centroidx100%124,498
centroidy100%124,498
surfpointx100%124,498
surfpointy100%124,498
geom100%124,498
extras100%124,498
ownerlist74.6%92,896
placefp76.6%95,410
zoningurl3.9%4,872
lbcsactivity38.3%47,680
lbcsfunction38.2%47,601
lbcstype41.4%51,501
lbcscharacter46.0%57,264
lbcsownership100%124,483
sourceurl95.4%118,802

Schema mapping

How source columns from the acquired Winnebago County GIS layers map into the harmonized entity schemas and assemble into the published parcel table, alongside supplemented fields (elevation, flood zone) and deterministic columns.

Schema mapping — Winnebago County, Illinois (17201) 2 entities · most recent acquisition per entity · generated 2026-10-17 direct column transformed (expression) geometry extras json supplemented determined ALL ENTITIES → FINAL PARCEL SCHEMA Harmonized entity columns assemble into publish.parcel_layer — matched by column name. Supplemented fields show their fill rate in this county. SOURCE COLUMNS HARMONIZED ENTITIES PUBLISH.PARCEL_LAYER PARCEL pin altparcelnumber parcelyear ownerlastname ownerfirstname ownermiddleinit ownersuffix owneraddress1 owneraddress2 ownercity ownerstate ownerzip lopprefixdirectional lophousenumber lophousenbrsuffix lopstreetname lopstreetsuffix loppostdirectional lopcommunityname legaldesc townshipname ownerlastchange geom 13 cols ⇢ parcelid parcelid2 taxyear ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity legaldesc township updated geom extras ZONING zoningcode zoningclas geom zoningcode zoningdesc geom extras determined · ground truth 100% lrid 100% geoid 100% statefp 100% countyfp 100% countyname 100% cousubfp 100% cousubname 100% tractce 100% tractname geom · derived from geometry geom dem.us_1m · USGS 1m DEM 100% elevmin 100% elevmax 100% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 97.7% zonesubty 0.0% staticbfe 100% firmdate 100% firmid supplemented · derived / other pipelines 95.6% taxacres 100% parcelstate 100% parcelzip 100% section 100% qtrsection 100% range 100% plssdesc 74.6% ownerlist 76.6% placefp 100% lbcsownership 95.4% sourceurl lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxyear zoningcode zoningdesc taxacres calcarea ownertype ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate parcelzip legaldesc township section qtrsection range plssdesc firmid firmdate fldzone zonesubty staticbfe elevmin elevmax elevavg updated centroidx centroidy surfpointx surfpointy geom extras ownerlist placefp lbcsownership sourceurl publish.parcel_layer columns not fed by these sources (48) — empty or below 50% fill in this county parentid, stackid, taxacctnum, taxdistrict, usecode, usedesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths fullbaths, imprvalue, landvalue, agvalue, totalvalue, saleamt, saledate, book, page, block, lot, parceltype, accesstype, iucnclass, placename placetype, fireplaces, heating, heatfuel, cooling, foundation, roofcover, siding, bldgtype, naicscode, frsid, dfrurl, caapermit, cwapermit rcrapermit, zoningurl, lbcsactivity, lbcsfunction, lbcstype, lbcscharacter PARCEL 14 mapped · 3 transformed · 13 kept in extras · 40 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL pin altparcelnumber parcelyear ownerlastname ownerfirstname ownermiddleinit ownersuffix owneraddress1 owneraddress2 ownercity ownerstate ownerzip lopprefixdirectional lophousenumber lophousenbrsuffix lopstreetname lopstreetsuffix loppostdirectional lopcommunityname legaldesc townshipname ownerlastchange geom parcelid parcelid2 taxyear ownername NULLIF(concat_ws(';', NULLIF(btrim(ownerlastname), ''), NULLIF(… owneraddr NULLIF(concat_ws(' ', NULLIF(btrim(owneraddress1), ''), NULLIF(… ownercity ownerstate ownerzip parceladdr NULLIF(concat_ws(' ', NULLIF(btrim(lopprefixdirectional), ''), … parcelcity legaldesc township updated geom extras · 13 source columns preserved as json primarypin, dashpin, taxpayerlastname, taxpayerfirstname taxpayermiddleinit, taxpayersuffix, taxpayeraddress1 taxpayeraddress2, taxpayercity, taxpayerstate, taxpayerzip optout, globalid extras not present in source — filled with NULL (40) taxacctnum, usecode, usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths, fullbaths imprvalue, landvalue, agvalue, totalvalue, taxacres, saleamt, saledate, parcelstate, parcelzip, section, qtrsection, range, plssdesc, book page, block, lot, sourceurl, taxdistrict, parentid, heatfuel, fireplaces, heating, cooling, foundation, roofcover, siding ZONING 4 mapped · 1 transformed · 6 unmapped (NULL) SOURCE COLUMNS HARMONIZED → ZONING zoningcode zoningclas geom zoningcode zoningdesc geom extras json_build_object() not present in source — filled with NULL (6) zoningtype, ordinance, setbacks, restrictions, notes, sourceurl

Neighboring counties

Parcel data for counties bordering Winnebago County:

Frequently asked questions

Where can I find Winnebago County, IL parcel and GIS data?

Land Records publishes a Winnebago 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 Winnebago County, IL dataset as a GeoPackage or CSV.

How many parcels are in Winnebago County, IL?

The current dataset contains 124,498 parcel records for Winnebago County, IL, each with its boundary geometry and assessor attributes.

What is the FIPS code for Winnebago County, IL?

The FIPS code for Winnebago County, IL is 17201.

What information does each Winnebago County, IL parcel record include?

Each Winnebago 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 Winnebago County, IL parcel data free?

You can preview Winnebago 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 Winnebago County, IL have an official GIS or property records website?

Yes — the official Winnebago County, IL government website is linked in the county details above. Land Records standardizes Winnebago County, IL assessor and recorder records into a single nationwide parcel schema with GIS boundary geometry.

On this page

Attribute coverageSchema mappingNeighboring countiesFAQRelated