Cook County, IL Property & Market Data

Cook County, Illinois has 3,984,427 parcels tracked in the Rippleffekt property database, 79% of them mapped to a precise location, a median household income of $82,729, and an unemployment rate of 6.9%.

Cook County at a glance

Rippleffekt tracks 3,984,427 parcels in Cook County, Illinois. The figures below combine county assessor coverage with federal economic data for the county.

3,984,427
Parcels tracked
79%
Mapped to location
3,160,237 parcels
945 sq mi
Land area
4,216.7 per sq mi
Parcel density
$82,729
Median household income
6.9%
Unemployment rate

Tax lien activity

Public tax-lien records on file for Cook County. Delinquent tax liens can signal distressed or motivated ownership.

141,045
Tax lien records
$361,655,045
Total amount due
$3,649
Average per lien

Illinois commercial real estate lending

Statewide commercial real estate lending context from FFIEC bank call reports as of 2024-12-31. This reflects the broader Illinois lending environment, not Cook County alone.

350
Banks reporting
$194.9B
Real estate loans
$80.1B
Nonresidential CRE loans

Go deeper on Cook County

Explore the Illinois market, browse live listings, or run a full property or area report.

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Sources: county assessor records, U.S. Census ACS and SAIPE, FFIEC bank call reports, and public tax-lien records. Updated 2026-07-29.