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Boone County, Illinois

Boone 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
COUNTY OF BOONE
GUS Population: 53,313 (2024)
ID: 201613
County Official County Government
Contact: COUNTY ADMINISTRATOR
1212 LOGAN AVE, SUITE 102, BELVIDERE IL 61008-4033
GUS Population: 29,342 (2024)
ID: 125103
Township Municipal Government Within County
Contact: SUPERVISOR
8200 FAIRGROUNDS RD, BELVIDERE IL 61008-9791
GUS Population: 25,325 (2024)
ID: 162180
Municipal Municipal Government Within County
Contact: FINANCE DIRECTOR
401 WHITNEY BLVD, STE 100, BELVIDERE IL 61008-3693
TOWNSHIP OF CALEDONIA
GUS Population: 7,221 (2024)
ID: 162733
Township Municipal Government Within County
Contact: SUPERVISOR
523 BOUNTY DR NE, POPLAR GROVE IL 61065-8940
TOWNSHIP OF POPLAR GROVE
GUS Population: 5,172 (2024)
ID: 162735
Township Municipal Government Within County
Contact: SUPERVISOR
13710 BEAVERTON RD, POPLAR GROVE IL 61065-8859
GUS Population: 5,165 (2024)
ID: 162181
Municipal Municipal Government Within County
Contact: VILLAGE CLERK
200 N HILL ST, POPLAR GROVE IL 61065-6500
TOWNSHIP OF BONUS
GUS Population: 4,371 (2024)
ID: 162731
Township Municipal Government Within County
Contact: SUPERVISOR
9015 MARENGO RD, GARDEN PRAIRIE IL 61038-9746
TOWNSHIP OF FLORA
GUS Population: 2,999 (2024)
ID: 189955
Township Municipal Government Within County
Contact: TOWNSHIP SUPERVISOR
3100 TOWNHALL RD, BELVIDERE IL 61008
TOWNSHIP OF BOONE
GUS Population: 2,019 (2024)
ID: 162732
Township Municipal Government Within County
Contact: SUPERVISOR
15831 MEIER RD, POPLAR GROVE IL 61065-9042
VILLAGE OF CAPRON
GUS Population: 1,402 (2024)
ID: 124860
Municipal Municipal Government Within County
Contact: TREASURER
PO BOX 314, CAPRON IL 61012-0314
GUS Population: 902 (2024)
ID: 189914
Municipal Municipal Government Within County
Contact: VILLAGE PRESIDENT
PO BOX 56, CALEDONIA IL 61011-0056
TOWNSHIP OF MANCHESTER
GUS Population: 867 (2024)
ID: 102893
Township Municipal Government Within County
Contact: SUPERVISOR
19912 POPLAR GROVE RD, POPLAR GROVE IL 61065-9328
GUS Population: 857 (2024)
ID: 162736
Township Municipal Government Within County
Contact: SUPERVISOR
1236 SZHATTUCK RD, GARDEN PRAIRIE IL 61038
TOWNSHIP OF LEROY
GUS Population: 465 (2024)
ID: 162734
Township Municipal Government Within County
Contact: SUPERVISOR
PO BOX 81, CAPRON IL 61012-0081
VILLAGE OF CALEDONIA
GUS Population: 182 (2024)
ID: 162182
Municipal Municipal Government Within County
Contact: FIN. OFFICER/TREAS.
PO BOX 34, CALEDONIA IL 61011-0034