All states
Illinois
10 layers of parcels and buildings, each tested with our export code. The national base map (roads, water, buildings) is offered everywhere too.
Open the map| Area | Layers | Checked | Map |
|---|---|---|---|
| Cook County | ParcelsBuildings | 3 Nov 2026 | Map |
| DuPage County | Parcels | 3 Nov 2026 | Map |
| Kane County | ParcelsBuildings | 3 Nov 2026 | Map |
| Lake County | ParcelsBuildings | 3 Nov 2026 | Map |
| McHenry County | Parcels | 3 Nov 2026 | Map |
| Sangamon County | Parcels | 3 Nov 2026 | Map |
| St. Clair County | Parcels | 3 Nov 2026 | Map |
Terms, checks and service URLs for every layer
Cook County
ParcelsChecked 3 Nov 2026
- What it is
- Cook County Parcels (CookViewer3Parcels). Current tax year (TAXYR 2025 at verification); layer edited continuously by Cook County GIS. Assessor tax parcels, not legal boundaries or a survey.
- Publisher
- Cook County Bureau of Technology, GIS Department (gis.cookcountyil.gov)
- Checked
- Fetched by our export code on a ~300 m test site on 3 November 2026: 64 features. See it on the map
- Terms
- Public, no token; Cook County GIS Dept. data with standard county disclaimer
- Layer URL
Building footprintsChecked 3 Nov 2026
- What it is
- Cook County Building Footprints 2022. Spring 2022 lidar and orthoimagery; published 2025
- Publisher
- Cook County GIS
- Checked
- Fetched by our export code on a ~300 m test site on 3 November 2026: 37 features. See it on the map
- Terms
- Public; Cook County GIS open data, provided as is with a no-liability disclaimer
- Layer URL
DuPage County
ParcelsChecked 3 Nov 2026
- What it is
- DuPage County Parcels with Real Estate (ParcelsWithRealEstateCC). Assessment parcels, current; County Clerk real estate file joined weekly. Assessor tax parcels, not legal boundaries or a survey.
- Publisher
- DuPage County Information Technology Department, GIS Division (gis.dupageco.org)
- Checked
- Fetched by our export code on a ~300 m test site on 3 November 2026: 3 features. See it on the map
- Terms
- Public, no token; DuPage County IT GIS Division with County Clerk; standard disclaimer
- Layer URL
Kane County
ParcelsChecked 3 Nov 2026
- What it is
- Kane County Parcels (KanePINList, Parcels_v2025). Snapshot of the active cadastral layer plus assessment records (layer Kane.DBO.Parcels_v2025); not the certified tax parcels. Assessor tax parcels, not legal boundaries or a survey.
- Publisher
- Kane County GIS-Technologies with Supervisor of Assessments and County Clerk (gistech.countyofkane.org)
- Checked
- Fetched by our export code on a ~300 m test site on 3 November 2026: 24 features. See it on the map
- Terms
- Public, no token; Kane County GIS/Assessments/Clerk; no license text on the service
- Layer URL
Building footprintsChecked 3 Nov 2026
- What it is
- Kane County Building Footprints. Traced from aerial photos over the years; maintained by the county (edits through 2025)
- Publisher
- Kane County GIS
- Checked
- Fetched by our export code on a ~300 m test site on 3 November 2026: 26 features. See it on the map
- Terms
- Public; Kane County GIS, provided as is for informational purposes, no-warranty/no-liability disclaimer
- Layer URL
Lake County
ParcelsChecked 3 Nov 2026
- What it is
- Lake County IL Tax Parcel Information (WABParcels). Current assessment/tax roll joined to tax parcels (Chief County Assessment Office data). Assessor tax parcels, not legal boundaries or a survey.
- Publisher
- Lake County, Illinois GIS Division (maps.lakecountyil.gov)
- Checked
- Fetched by our export code on a ~300 m test site on 3 November 2026: 44 features. See it on the map
- Terms
- Public, no token; Lake County, Illinois GIS Division / CCAO; standard disclaimer
- Layer URL
Building footprintsChecked 3 Nov 2026
- What it is
- Lake County Building Outlines (planimetrics). Traced from 2002 aerials, updated from successive flights through 2017-2018
- Publisher
- Lake County, Illinois GIS Division
- Checked
- Fetched by our export code on a ~300 m test site on 3 November 2026: 136 features. See it on the map
- Terms
- Lake County GIS Terms of Use: free for personal or business use, no copyright held; as-is, no-liability disclaimer; not intended as a base for engineering design
- Layer URL
McHenry County
ParcelsChecked 3 Nov 2026
- What it is
- McHenry County TaxParcels. Hosted copy refreshed regularly (item modified 2026-10-16). Assessor tax parcels, not legal boundaries or a survey.
- Publisher
- McHenry County, Illinois (ArcGIS Online org account 'McHenryCounty')
- Checked
- Fetched by our export code on a ~300 m test site on 3 November 2026: 11 features. See it on the map
- Terms
- Public, no token; McHenry County hosted layer, no license text on the item
- Layer URL
Sangamon County
ParcelsChecked 3 Nov 2026
- What it is
- Sangamon County Parcels (SangCadastral). Parcel polygons current; joined assessment table reports CurrTxYr 2022 (attributes may lag). Assessor tax parcels, not legal boundaries or a survey.
- Publisher
- Sangamon County, Illinois GIS (SanGIS, sangis.co.sangamon.il.us)
- Checked
- Fetched by our export code on a ~300 m test site on 3 November 2026: 37 features. See it on the map
- Terms
- Public, no token; Sangamon County GIS with standard accuracy disclaimer
- Layer URL
St. Clair County
ParcelsChecked 3 Nov 2026
- What it is
- St. Clair County IL Parcels (SCC_parcel_map_data). Current parcel map viewer data (paryear field gives the assessment year). Assessor tax parcels, not legal boundaries or a survey.
- Publisher
- St. Clair County, Illinois GIS Department (arcgispublicmap.co.st-clair.il.us)
- Checked
- Fetched by our export code on a ~300 m test site on 3 November 2026: 88 features. See it on the map
- Terms
- Public map service, no token, no license text on the service. Note: the county sells bulk parcel extracts ($1/parcel); this entry only uses per-parcel live queries.
- Layer URL
“Checked” means fetched by our export code on a test site. How we check · Data credits. Most local layers were found through Basesheet's source list (Copyright (c) 2026 Hunter Hillman, MIT License), then re-checked by us.