Winnebago County, Illinois
Winnebago 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: 283,790 (2024)
ID: 162169
|
County | Official County Government |
Contact: PAYROLL MANAGER
404 ELM ST, STE 520, ROCKFORD IL 61101-1244
|
|
GUS Population: 169,120 (2024)
ID: 204332
|
Township | Municipal Government Within County |
Contact: MANAGER OF FISCAL OPERATIONS
119 N CHURCH ST, STE 400, ROCKFORD IL 61101-1094
|
|
GUS Population: 147,486 (2024)
ID: 102882
|
Municipal | Municipal Government Within County |
Contact: INTERIM FIN DIR
425 E STATE ST, ROCKFORD IL 61104-1068
|
|
GUS Population: 39,279 (2024)
ID: 163407
|
Township | Municipal Government Within County |
Contact: DEPUTY SUPERVISOR
819 MELBOURNE ST, MACHESNEY PARK IL 61115-1694
|
|
GUS Population: 23,636 (2024)
ID: 162707
|
Municipal | Municipal Government Within County |
Contact: CITY CLERK
100 HEART BLVD, LOVES PARK IL 61111-4797
|
|
GUS Population: 22,839 (2024)
ID: 125095
|
Municipal | Municipal Government Within County |
Contact: ACCOUNTANT
300 ROOSEVELT RD, MACHESNEY PARK IL 61115-2495
|
|
TOWNSHIP OF ROSCOE
GUS Population: 20,233 (2024)
ID: 163411
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
5792 ELEVATOR RD, ROSCOE IL 61073-8878
|
|
TOWNSHIP OF CHERRY VALLEY
GUS Population: 19,269 (2024)
ID: 163406
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
4875 BLACKHAWK RD, ROCKFORD IL 61109-4061
|
|
TOWNSHIP OF ROCKTON
GUS Population: 16,135 (2024)
ID: 163410
|
Township | Municipal Government Within County |
Contact: OFFICE MANAGER
1315 N BLACKHAWK BLVD, ROCKTON IL 61072-1598
|
|
GUS Population: 10,981 (2024)
ID: 102886
|
Municipal | Municipal Government Within County |
Contact: TREASURER
PO BOX 283, ROSCOE IL 61073-0283
|
|
CITY OF SOUTH BELOIT
GUS Population: 7,983 (2024)
ID: 162710
|
Municipal | Municipal Government Within County |
Contact: MAYOR
519 BLACKHAWK BLVD, STE 2, SOUTH BELOIT IL 61080-1999
|
|
GUS Population: 7,861 (2024)
ID: 162709
|
Municipal | Municipal Government Within County |
Contact: TREASURER
697 S BLACKHAWK BLVD, ROCKTON IL 61072-2909
|
|
TOWNSHIP OF WINNEBAGO
GUS Population: 4,968 (2024)
ID: 163412
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
PO BOX 575, WINNEBAGO IL 61088-0575
|
|
TOWNSHIP OF PECATONICA
GUS Population: 4,127 (2024)
ID: 185112
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
PO BOX 328, PECATONICA IL 61063-0328
|
|
TOWNSHIP OF OWEN
GUS Population: 3,590 (2024)
ID: 163409
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
7029 BERGSTROM DR, ROCKFORD IL 61103-8817
|
|
GUS Population: 2,907 (2024)
ID: 162711
|
Municipal | Municipal Government Within County |
Contact: DEPUTY CLERK
108 W MAIN ST, WINNEBAGO IL 61088-8579
|
|
GUS Population: 2,888 (2024)
ID: 125093
|
Municipal | Municipal Government Within County |
Contact: VILLAGE TREASURER
806 E STATE ST, CHERRY VALLEY IL 61016-9310
|
|
TOWNSHIP OF DURAND
GUS Population: 2,300 (2024)
ID: 103120
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
PO BOX 534, DURAND IL 61024-0534
|
|
GUS Population: 2,058 (2024)
ID: 125094
|
Municipal | Municipal Government Within County |
Contact: TREASURER
PO BOX 730, PECATONICA IL 61063-0730
|
|
GUS Population: 1,383 (2024)
ID: 162706
|
Municipal | Municipal Government Within County |
Contact: TREASURER
PO BOX166, 308 W MAIN ST, DURAND IL 61024-0166
|
|
TOWNSHIP OF LAONA
GUS Population: 1,263 (2024)
ID: 125373
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
PO BOX 396, DURAND IL 61024-0396
|
|
TOWNSHIP OF BURRITT
GUS Population: 1,096 (2024)
ID: 163405
|
Township | Municipal Government Within County |
Contact: CLERK
11569 TELEGRAPH RD, PECATONICA IL 61063-9188
|
|
TOWNSHIP OF SHIRLAND
GUS Population: 964 (2024)
ID: 125374
|
Township | Municipal Government Within County |
Contact: TOWNSHIP SUPERVISOR
PO BOX 68, SHIRLAND IL 61079-0068
|
|
TOWNSHIP OF SEWARD
GUS Population: 840 (2024)
ID: 103121
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
16272 GRANT ST, SEWARD IL 61077
|
|
VILLAGE OF NEW MILFORD
GUS Population: 807 (2024)
ID: 162708
|
Municipal | Municipal Government Within County |
Contact: VILLAGE CLERK
6771 11TH ST, ROCKFORD IL 61109-4977
|
|
TOWNSHIP OF HARRISON
GUS Population: 606 (2024)
ID: 163408
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
11105 FARM SCHOOL RD, DURAND IL 61024
|