Cook County, Illinois
Cook County profile, demographic data, and geographic information.
Local Government & Public Administration
Authoritative general-purpose local government units serving this area
U.S. Census Bureau GUS (2026) / GMAF
| Government Unit | Unit Type | Jurisdiction Role | Contact / Address |
|---|---|---|---|
|
GUS Population: 5,182,617 (2024)
ID: 102545
|
County | Official County Government |
Contact: COMPTROLLER
118 N CLARK ST, ROOM 1127, CHICAGO IL 60602-1394
|
|
GUS Population: 2,721,308 (2024)
ID: 162236
|
Municipal | Municipal Government Within County |
Contact: ADMINISTRATOR
121 N LA SALLE ST, CHICAGO IL 60602-1202
|
|
GUS Population: 153,558 (2024)
ID: 207883
|
Township | Municipal Government Within County |
Contact: DIRECTOR FINANCE ADMIN
1616 N ARLINGTON HEIGHTS RD, STE 101, ARLINGTON HEIGHTS IL 60004-3991
|
|
GUS Population: 152,759 (2024)
ID: 162829
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
333 E 162ND ST, SOUTH HOLLAND IL 60473-2142
|
|
GUS Population: 148,604 (2024)
ID: 162830
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
11601 S PULASKI RD, ALSIP IL 60803-1611
|
|
GUS Population: 147,156 (2024)
ID: 185063
|
Township | Municipal Government Within County |
Contact: PROVISO TOWNSHIP DEPUTY CLERK
4565 HARRISON ST, HILLSIDE IL 60162-1614
|
|
GUS Population: 136,256 (2024)
ID: 162822
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
1700 BALLARD RD, PARK RIDGE IL 60068-1006
|
|
GUS Population: 131,447 (2024)
ID: 125141
|
Township | Municipal Government Within County |
Contact: ADMINISTRATOR
1 ILLINOIS BLVD, HOFFMAN ESTATES IL 60169-3314
|
|
TOWNSHIP OF LYONS
GUS Population: 112,291 (2024)
ID: 162821
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
6404 JOLIET RD, COUNTRYSIDE IL 60525
|
|
GUS Population: 111,316 (2024)
ID: 162826
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
721 S QUENTIN RD, STE 101, PALATINE IL 60067-6778
|
|
GUS Population: 109,048 (2024)
ID: 162823
|
Township | Municipal Government Within County |
Contact: DEPUTY CLERK
5255 MAIN ST, SKOKIE IL 60077-2191
|
|
GUS Population: 104,285 (2024)
ID: 162817
|
Township | Municipal Government Within County |
Contact: OFFICE MANAGER
16361 KEDZIE AVE, 2, MARKHAM IL 60428-5599
|
|
GUS Population: 97,751 (2024)
ID: 102921
|
Township | Municipal Government Within County |
Contact: MANAGEMENT ANALYST
250 S IL ROUTE 59, BARTLETT IL 60103-1648
|
|
GUS Population: 96,553 (2024)
ID: 194903
|
Township | Municipal Government Within County |
Contact: EXECUTIVE ADMINISTRATOR
14807 S RAVINIA AVE, ORLAND PARK IL 60462-3168
|
|
GUS Population: 92,996 (2024)
ID: 162818
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
2400 S ARLINGTON HEIGHTS RD, ARLINGTON HEIGHTS IL 60005-4558
|
|
TOWNSHIP OF LEYDEN
GUS Population: 90,471 (2024)
ID: 162820
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
2501 MANNHEIM RD, FRANKLIN PARK IL 60131-3134
|
|
GUS Population: 89,504 (2024)
ID: 102923
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
2550 WAUKEGAN RD, STE 100, GLENVIEW IL 60025-1777
|
|
TOWNSHIP OF BLOOM
GUS Population: 83,626 (2024)
ID: 102920
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
425 S HALSTED ST, CHICAGO HEIGHTS IL 60411-1212
|
|
GUS Population: 82,090 (2024)
ID: 162237
|
Municipal | Municipal Government Within County |
Contact: SENIOR ACCOUNTANT
4949 W CERMAK RD, CICERO IL 60804-3497
|
|
GUS Population: 77,099 (2024)
ID: 212610
|
Municipal | Municipal Government Within County |
Contact: DIRECTOR
101 SCHAUMBURG CT, SCHAUMBURG IL 60193-1899
|
|
GUS Population: 76,006 (2024)
ID: 124885
|
Municipal | Municipal Government Within County |
Contact: TREASURER
2100 RIDGE AVE, 1, EVANSTON IL 60201-2796
|
|
GUS Population: 75,596 (2024)
ID: 162229
|
Municipal | Municipal Government Within County |
Contact: ACCOUNTANT
33 S ARLINGTON HEIGHTS RD, ARLINGTON HEIGHTS IL 60005-1499
|
|
GUS Population: 73,996 (2024)
ID: 125140
|
Township | Municipal Government Within County |
Contact: FINANCE MANAGER
22013 GOVERNORS HWY, RICHTON PARK IL 60471-1247
|
|
GUS Population: 65,951 (2024)
ID: 207782
|
Municipal | Municipal Government Within County |
Contact: FINANCE DIRECTOR
200 E WOOD ST, PALATINE IL 60067-5332
|
|
GUS Population: 65,850 (2024)
ID: 162264
|
Municipal | Municipal Government Within County |
Contact: ASSISTANT FINANCE DIRECTOR
5127 OAKTON ST, SKOKIE IL 60077-3633
|
|
GUS Population: 58,832 (2024)
ID: 162239
|
Municipal | Municipal Government Within County |
Contact: FIN. OFFICER/TREAS.
1420 MINER ST, STE 100, DES PLAINES IL 60016-4498
|
|
GUS Population: 58,020 (2024)
ID: 124893
|
Municipal | Municipal Government Within County |
Contact: FINANCIAL ANALYST
14700 S RAVINIA AVE, ORLAND PARK IL 60462-3167
|
|
GUS Population: 56,531 (2024)
ID: 124891
|
Municipal | Municipal Government Within County |
Contact: FINANCE OFFICER
9446 RAYMOND AVE, STE 1, OAK LAWN IL 60453-2449
|
|
GUS Population: 56,064 (2024)
ID: 189962
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
739 ELM ST, WINNETKA IL 60093-2586
|
|
GUS Population: 55,460 (2024)
ID: 162258
|
Municipal | Municipal Government Within County |
Contact: VILLAGE CLERK
50 S EMERSON ST, MT PROSPECT IL 60056-3218
|
|
GUS Population: 55,406 (2024)
ID: 194944
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
10802 S ROBERTS RD, PALOS HILLS IL 60465-2382
|
|
TOWNSHIP OF BERWYN
GUS Population: 55,152 (2024)
ID: 125137
|
Township | Municipal Government Within County |
Contact: TOWNSHIP SUPERVISOR
6600 26TH ST, BERWYN IL 60402-2652
|
|
GUS Population: 55,152 (2024)
ID: 207777
|
Municipal | Municipal Government Within County |
Contact: FINANCE DIRECTOR
6700 26TH ST, BERWYN IL 60402-0701
|
|
GUS Population: 54,856 (2024)
ID: 102638
|
Municipal | Municipal Government Within County |
Contact: TREASURER
16250 OAK PARK AVE, TINLEY PARK IL 60477-1600
|
|
GUS Population: 52,947 (2024)
ID: 124892
|
Municipal | Municipal Government Within County |
Contact: CFO/TREASURER
123 MADISON ST, OAK PARK IL 60302-4205
|
|
GUS Population: 52,947 (2024)
ID: 162825
|
Township | Municipal Government Within County |
Contact: FIN. OFFICER/TREAS.
105 S OAK PARK AVE, OAK PARK IL 60302-2981
|
|
GUS Population: 50,920 (2024)
ID: 162277
|
Municipal | Municipal Government Within County |
Contact: FINANCE DIRECTOR
1900 HASSELL RD, HOFFMAN ESTATES IL 60169
|
|
GUS Population: 47,634 (2024)
ID: 204271
|
Municipal | Municipal Government Within County |
Contact: DIRECTOR OF PLANNING
2500 E LAKE AVE, GLENVIEW IL 60026
|
|
GUS Population: 43,072 (2024)
ID: 207784
|
Municipal | Municipal Government Within County |
Contact: FINANCE DIRECTOR
50 RAUPP BLVD, BUFFALO GROVE IL 60089-2100
|
|
GUS Population: 40,718 (2024)
ID: 102592
|
Municipal | Municipal Government Within County |
Contact: GIS SPECIALIST
228 S MAIN ST, BARTLETT IL 60103-4495
|
|
GUS Population: 40,302 (2024)
ID: 102924
|
Township | Municipal Government Within County |
Contact: ADMINISTRATOR
5635 STATE RD, BURBANK IL 60459-2051
|
|
GUS Population: 38,445 (2024)
ID: 124895
|
Municipal | Municipal Government Within County |
Contact: FINANCE DIRECTOR
505 BUTLER PL, PARK RIDGE IL 60068-4182
|
|
GUS Population: 38,360 (2024)
ID: 102643
|
Municipal | Municipal Government Within County |
Contact: FINANCE DIRECTOR
301 E IRVING PARK RD, STREAMWOOD IL 60107-3096
|
|
GUS Population: 38,329 (2024)
ID: 162269
|
Municipal | Municipal Government Within County |
Contact: ASSISTANT FINANCE DIRECTOR
2 COMMUNITY BLVD, WHEELING IL 60090-2726
|
|
GUS Population: 36,685 (2024)
ID: 162274
|
Municipal | Municipal Government Within County |
Contact: ASSISTANT FINANCE DIRECTOR
2121 W LAKE ST, HANOVER PARK IL 60133-4398
|
|
GUS Population: 34,855 (2024)
ID: 124883
|
Municipal | Municipal Government Within County |
Contact: TREASURER
PO BOX 1519, CALUMET CITY IL 60409-7519
|
|
GUS Population: 34,546 (2024)
ID: 194701
|
Municipal | Municipal Government Within County |
Contact: DIRECTOR OF FINANCE
1225 CEDAR LN, NORTHBROOK IL 60062-4582
|
|
GUS Population: 31,802 (2024)
ID: 162273
|
Municipal | Municipal Government Within County |
Contact: FINANCIAL ANALYST
901 WELLINGTON AVE, ELK GROVE VLG IL 60007-3456
|
|
GUS Population: 29,918 (2024)
ID: 194700
|
Municipal | Municipal Government Within County |
Contact: ASSISTANT FINANCE DIRECTOR
1000 CIVIC CENTER DR, NILES IL 60714-3229
|
|
GUS Population: 28,606 (2024)
ID: 124901
|
Municipal | Municipal Government Within County |
Contact: TREASURER
6530 W 79TH ST, STE 2, BURBANK IL 60459-1198
|