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County governmentIllinois

Lake County, Illinois

1,320 open datasets published by this county government. Latest update 10/18/2026.

Datasets

1,320

131 with descriptions

Topics

18

Maps & Geospatial

File formats

9

ArcGIS REST, ZIP, GeoJSON

Used on DatenUS

0

Not yet

Datasets

1,320 datasets

Only the first 50 pages are listed. Narrow the list by area or type to see more.

Frequently asked questions

How many datasets does Lake County, Illinois publish?
The DatenUS catalog lists 1,320 open datasets from Lake County, Illinois, most often about maps & geospatial and water.
Where can I download Lake County, Illinois data?
Each dataset page links to the official download files and APIs on the government's open data portal. DatenUS does not host copies, so you always get the current version.
How current is this list?
We check the source catalogs every day. The most recent dataset change from Lake County, Illinois was on 10/18/2026.

Source: State and local open data portals and Data.gov · Last updated 10/18/2026