Largest Cities in Mercer County, IL by Population
Mercer County, county in Illinois, United States. As of 2020 county had an estimated population of 15,225 inhabitants. The county was created 201 years ago in 1825. Its county seat is Aledo.
There are 2 city/town in Mercer County, IL. The largest city of Mercer County is Aledo with a population of 3,383. Other cities include and Preemption population 1,628
Aledo
Aledo, City in Mercer County, Illinois, United States
Preemption
Preemption, Township in Mercer County, Illinois
All Mercer County Cities (Aphebetical)
List of cities, towns, neighborhoods & other populated places in Mercer County.
| City Name | Population |
|---|---|
| Aledo | 3,383 |
| Preemption | 1,628 |
County Cities on Map (2)
Illinois Counties (102)
Cook County (5,108,284)
DuPage County (917,481)
Lake County (693,593)
Will County (688,726)
Kane County (531,010)
McHenry County (305,888)
Winnebago County (281,295)
Madison County (262,635)
Saint Clair County (258,046)
Champaign County (209,192)
Sangamon County (193,882)
Peoria County (177,652)
McLean County (171,256)
Rock Island County (140,907)
Tazewell County (130,777)
Kendall County (130,638)
Kankakee County (108,594)
LaSalle County (107,571)
DeKalb County (104,491)
Macon County (103,015)
Vermilion County (74,855)
Williamson County (66,415)
Adams County (64,783)
Jackson County (56,675)
Whiteside County (54,656)
Boone County (52,777)
Grundy County (50,993)
Coles County (50,383)
Ogle County (50,306)
Knox County (49,053)
Henry County (48,411)
Macoupin County (44,567)
Stephenson County (43,831)
Woodford County (38,091)
Franklin County (38,060)
Clinton County (37,398)
Jefferson County (37,235)
Marion County (37,045)
Livingston County (35,414)
Monroe County (34,739)
Effingham County (34,065)
Fulton County (33,690)
Lee County (33,647)
Morgan County (33,400)
Bureau County (32,303)
Christian County (32,075)
Randolph County (31,351)
McDonough County (29,295)
Logan County (28,383)
Montgomery County (28,045)
Iroquois County (26,711)
Saline County (23,182)
Jersey County (21,616)
Shelby County (21,299)
Fayette County (21,264)
Jo Daviess County (21,239)
Perry County (20,664)
Douglas County (19,510)
Crawford County (18,512)
Hancock County (17,422)
Edgar County (16,858)
Warren County (16,696)
Union County (16,498)
Piatt County (16,355)
Bond County (16,262)
Wayne County (16,031)
Richland County (15,507)
Lawrence County (15,467)
De Witt County (15,368)
Clark County (15,268)
Pike County (15,239)
Mercer County (15,225)
Moultrie County (14,347)
Carroll County (14,241)
Washington County (13,764)
Massac County (13,636)
White County (13,364)
Mason County (13,173)
Clay County (13,079)
Ford County (12,949)
Greene County (12,702)
Johnson County (12,358)
Menard County (12,068)
Cass County (11,925)
Marshall County (11,309)
Wabash County (11,190)
Cumberland County (10,649)
Jasper County (9,465)
Hamilton County (8,084)
Schuyler County (6,738)
Brown County (6,546)
Henderson County (6,535)
Edwards County (6,356)
Putnam County (5,716)
Alexander County (5,497)
Stark County (5,262)
Pulaski County (5,201)
Scott County (4,950)
Gallatin County (4,793)
Calhoun County (4,616)
Pope County (4,142)
Hardin County (3,808)