PUBLIC REGISTRY INFORMATION

8,635 registered sex offenders in Cook County, Illinois

See the October 2026 registry snapshot for Cook County and search the map near a specific address.

Registry snapshot

October 2026
Registry records
8,635
Registry source
Illinois Sex Offender Registry

This is a snapshot. Check the official registry for current information.

Registry statistics

Population and rate comparison
Registry records per 10,000 residents
16.7
33% below the Illinois statewide rateIllinois: 24.8 per 10,000
Population estimate
5,182,090
About 1 registry record per
600 residents
Rank by registry rate#98 of 102 Illinois counties

U.S. Census Bureau, ACS 5-year estimate.

About this snapshot

The October 2026 snapshot lists 8,635 registry records in Cook County, Illinois. With an estimated population of 5,182,090, that is 16.7 registry records per 10,000 residents. This is 33% below the Illinois statewide rate (24.8 per 10,000).

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Cities near Cook County

LocationRegistry recordsPopulation estimateRecords per 10,000
Centralia23911,856201.6
Alton21425,27984.7
Robinson1067,084149.6
Addison5235,48914.7
Carpentersville5237,34613.9
Anna504,196119.2
Chester416,79760.3
Alsip3818,58320.4
Antioch3614,85924.2
Algonquin2930,0679.6
Orland Park2857,9164.8
Arlington Heigh21——
Arlington Heights2076,0052.6
Niles1530,0645.0
Park Ridge1138,6672.8
Lakevilla3——
Akron2——
Western Springs213,4461.5
Accra1——
Park Forst1——

ZIP codes near Cook County

LocationRegistry recordsPopulation estimateRecords per 10,000
ZIP code 6103214029,02048.2
ZIP code 6012012351,22524.0
ZIP code 6043511148,16723.0
ZIP code 614439713,45672.1
ZIP code 600146548,59013.4
ZIP code 607073741,1169.0
ZIP code 600023424,23214.0
ZIP code 60155317,90639.2
ZIP code 605452814,39219.5
ZIP code 600042551,8354.8
ZIP code 600072332,5927.1
ZIP code 600051528,8435.2
ZIP code 600101545,7473.3
ZIP code 600081422,8006.1
ZIP code 604391424,1925.8
ZIP code 600121312,36810.5
ZIP code 60015828,0962.8
ZIP code 6144843,94710.1
ZIP code 600001——
ZIP code 606711——

Other counties in Illinois

LocationRegistry recordsPopulation estimateRecords per 10,000
Lake County1,257714,22317.6
McHenry County517312,59116.5
DuPage County515930,0245.5
Lee County33433,86998.6
Williamson County29866,87644.6
DeKalb County180100,70317.9
Logan County17327,71362.4
Crawford County16018,51186.4
Fayette County14221,31566.6
Effingham County12834,52237.1
Edgar County9316,53556.2
Mason County8512,74566.7
Douglas County8219,75141.5
Cass County7112,78455.5
Richland County6615,59842.3
De Witt County5215,37333.8
Cumberland County4910,33447.4
Stark County415,30877.2
Edwards County376,07560.9
Gallatin County254,81951.9

Each area shows its own total. City, county, and ZIP totals can overlap. Population figures, where shown: U.S. Census Bureau, ACS 5-year estimate.

Frequently asked questions

How many registered sex offenders are listed in Cook County?

The October 2026 snapshot lists 8,635 registry records in Cook County, Illinois. Counts may differ from official registry totals. Check the official registry for current details.

How do city, county, and ZIP totals relate?

City, county, and ZIP boundaries can overlap, so the same registry record may appear in more than one area.

How can I check registry information near an address?

Open the free interactive map, enter an address, and choose a search radius. Verify identity and current status with the official registry.

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