Mercer County, Illinois
Mercer 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: 15,292 (2024)
ID: 162152
|
County | Official County Government |
Contact: MERCER COUNTY CLERK
COUNTY BUILDING, ALEDO IL 61231
|
|
TOWNSHIP OF MERCER
GUS Population: 3,857 (2024)
ID: 103053
|
Township | Municipal Government Within County |
Contact: MERCER TOWNSHIP SUPERVISOR
1876 115TH AVE, ALEDO IL 61231-8750
|
|
GUS Population: 3,522 (2024)
ID: 102790
|
Municipal | Municipal Government Within County |
Contact: CITY ADMINISTRATOR
120 N COLLEGE AVE, ALEDO IL 61231-1519
|
|
TOWNSHIP OF RICHLAND GROVE
GUS Population: 2,271 (2024)
ID: 103054
|
Township | Municipal Government Within County |
Contact: TOWNSHIP SUPERVISOR
319 RIDGEVIEW DR, SHERRARD IL 61281-9306
|
|
TOWNSHIP OF PREEMPTION
GUS Population: 1,639 (2024)
ID: 163198
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
PO BOX 182, MATHERVILLE IL 61263-0182
|
|
TOWNSHIP OF GREENE
GUS Population: 1,408 (2024)
ID: 212003
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
PO BOX 350, ALEDO IL 61486
|
|
TOWNSHIP OF NEW BOSTON
GUS Population: 1,145 (2024)
ID: 163196
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
407 3RD STREET, NEW BOSTON IL 61272
|
|
TOWNSHIP OF RIVOLI
GUS Population: 1,025 (2024)
ID: 189989
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
915 283RD ST, VIOLA IL 61486-9539
|
|
VILLAGE OF VIOLA
GUS Population: 843 (2024)
ID: 125019
|
Municipal | Municipal Government Within County |
Contact: TREASURER
PO BOX 278, VIOLA IL 61486-0278
|
|
VILLAGE OF MATHERVILLE
GUS Population: 690 (2024)
ID: 125018
|
Municipal | Municipal Government Within County |
Contact: TREASURER
PO BOX 585, MATHERVILLE IL 61263-0585
|
|
GUS Population: 688 (2024)
ID: 225778
|
Municipal | Municipal Government Within County |
Contact: VILLAGE CLERK
517 3RD ST, SHERRARD IL 61281
|
|
VILLAGE OF WINDSOR
GUS Population: 652 (2024)
ID: 125020
|
Municipal | Municipal Government Within County |
Contact: VILLAGE CLERK
125 N 3RD AVE, NEW WINDSOR IL 61465-9000
|
|
TOWNSHIP OF KEITHSBURG
GUS Population: 640 (2024)
ID: 125294
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
1105 MADISON STREET, KEITHSBURG IL 61442-9647
|
|
TOWNSHIP OF MILLERSBURG
GUS Population: 609 (2024)
ID: 163195
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
PO BOX 253, JOY IL 61260-0253
|
|
GUS Population: 605 (2024)
ID: 162538
|
Municipal | Municipal Government Within County |
Contact: CITY CLERK
405 MAIN ST, NEW BOSTON IL 61272
|
|
TOWNSHIP OF SUEZ
GUS Population: 590 (2024)
ID: 163199
|
Township | Municipal Government Within County |
Contact: TOWNSHIP SUPERVISOR
PO BOX 504, ALEXIS IL 61412-0504
|
|
GUS Population: 545 (2024)
ID: 162537
|
Municipal | Municipal Government Within County |
Contact: CITY CLERK
PO BOX 87, KEITHSBURG IL 61442-0087
|
|
TOWNSHIP OF PERRYTON
GUS Population: 444 (2024)
ID: 137908
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
1297 175TH ST, ALEDO IL 61231-8746
|
|
TOWNSHIP OF ELIZA
GUS Population: 401 (2024)
ID: 163194
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
644 156TH AVE, NEW BOSTON IL 61272
|
|
TOWNSHIP OF NORTH HENDERSON
GUS Population: 378 (2024)
ID: 125295
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
495 300TH ST, NORTH HENDERSON IL 61466-9694
|
|
TOWNSHIP OF ABINGTON
GUS Population: 362 (2024)
ID: 125293
|
Township | Municipal Government Within County |
Contact: TOWNSHIP CLERK
PO BOX 123, SEATON IL 61476-0123
|
|
VILLAGE OF JOY
GUS Population: 359 (2024)
ID: 207844
|
Municipal | Municipal Government Within County |
Contact: VILLAGE CLERK
PO BOX 265, JOY IL 61260
|
|
TOWNSHIP OF OHIO GROVE
GUS Population: 266 (2024)
ID: 163197
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
1932 55TH AVE, ALEDO IL 61231-8611
|
|
TOWNSHIP OF DUNCAN
GUS Population: 257 (2024)
ID: 103052
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
1226 145TH AVE, JOY IL 61260-8527
|
|
VILLAGE OF SEATON
GUS Population: 206 (2024)
ID: 207845
|
Municipal | Municipal Government Within County |
Contact: VILLAGE CLERK
PO BOX 36, SEATON IL 61476-0036
|
|
VILLAGE OF NORTH HENDERSON
GUS Population: 159 (2024)
ID: 162539
|
Municipal | Municipal Government Within County |
Contact: PRESIDENT
PO BOX 101, NORTH HENDERSON IL 61466-0101
|