Clark County, Illinois
Clark 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: 15,076 (2024)
ID: 124838
|
County | Official County Government |
Contact: COUNTY CLERK
COUNTY COURT HOUSE, MARSHALL IL 62441
|
|
TOWNSHIP OF MARSHALL
GUS Population: 4,456 (2024)
ID: 162793
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
605 ARCHER AVENUE, MARSHALL IL 62441
|
|
GUS Population: 3,865 (2024)
ID: 212962
|
Municipal | Municipal Government Within County |
Contact: MAYOR
PO BOX 298, MARSHALL IL 62441-0298
|
|
GUS Population: 3,406 (2024)
ID: 162791
|
Township | Municipal Government Within County |
Contact: SUPERVISOR CASEY TWP
104 E ADAMS AVE, CASEY IL 62420-1704
|
|
GUS Population: 2,376 (2024)
ID: 162220
|
Municipal | Municipal Government Within County |
Contact: CITY OF CASEY
PO BOX 425, CASEY IL 62420-0425
|
|
TOWNSHIP OF WABASH
GUS Population: 2,048 (2024)
ID: 137897
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
19975 N 2200TH ST, MARSHALL IL 62441-3538
|
|
TOWNSHIP OF MARTINSVILLE
GUS Population: 1,488 (2024)
ID: 162794
|
Township | Municipal Government Within County |
Contact: TOWNSHIP SUPERVISOR
11679 N 600TH ST, MARTINSVILLE IL 62442-2710
|
|
GUS Population: 1,083 (2024)
ID: 204267
|
Municipal | Municipal Government Within County |
Contact: CITY CLERK
PO BOX 340, MARTINSVILLE IL 62442-0340
|
|
TOWNSHIP OF WESTFIELD
GUS Population: 631 (2024)
ID: 162796
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
530 E MAPLE ST, WESTFIELD IL 62474-1108
|
|
VILLAGE OF WESTFIELD
GUS Population: 520 (2024)
ID: 162221
|
Municipal | Municipal Government Within County |
Contact: CLERK
PO BOX 216, WESTFIELD IL 62474-0216
|
|
TOWNSHIP OF YORK
GUS Population: 486 (2024)
ID: 137898
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
110 E MECHANIC ST, WEST UNION IL 62477-2921
|
|
TOWNSHIP OF ANDERSON
GUS Population: 419 (2024)
ID: 162789
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
15501 E ANDERSON RD, WEST UNION IL 62477-2040
|
|
TOWNSHIP OF JOHNSON
GUS Population: 363 (2024)
ID: 185061
|
Township | Municipal Government Within County |
Contact: TOWNSHIP SUPERVISOR
3997 N 100TH ST, CASEY IL 62420-3421
|
|
TOWNSHIP OF DOLSON
GUS Population: 351 (2024)
ID: 125128
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
10646 E 2250TH RD, PARIS IL 61944
|
|
TOWNSHIP OF MELROSE
GUS Population: 332 (2024)
ID: 102914
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
16366 E 500TH RD, WEST UNION IL 62477-2403
|
|
TOWNSHIP OF DARWIN
GUS Population: 325 (2024)
ID: 162792
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
10233 N 1950TH ST, MARSHALL IL 62441-5207
|
|
TOWNSHIP OF ORANGE
GUS Population: 257 (2024)
ID: 162795
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
5867 N 900TH ST, MARTINSVILLE IL 62442-3411
|
|
TOWNSHIP OF AUBURN
GUS Population: 229 (2024)
ID: 162790
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
16607 N 1200TH ST, MARSHALL IL 62441-3615
|
|
TOWNSHIP OF PARKER
GUS Population: 160 (2024)
ID: 201636
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
19147 N. 400TH ST., WESTFIELD IL 62474
|
|
TOWNSHIP OF DOUGLAS
GUS Population: 125 (2024)
ID: 185060
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
15255 E 2100TH RD, MARSHALL IL 62441-3426
|