Mercer County Illinois - Government Site
Population: 16,786
Area: 561 square miles
County Seat: Aledo
Area Code(s) in use: 309
Time Zone: CST
Adjacent counties:
Des Moines (IA) Henderson Henry Knox Louisa (IA) Muscatine (IA) Rock Island Warren
Airport
Ernest E Orwig Airport, M and J Air Incorporated Airport, Mercer County Airport, Mercer County Hospital Heliport, Russell Farms Airport, Weihler Airport, Young Airport
Bay
Boston Bay, Sturgeon Bay
Bridge
Downey Bridge (historical)
Building
Aledo City Hall, Mercer Carnegie Library, Mercer County Courthouse, Mercer County Jail, New Windsor Public Library, Niles Hall, Saint Catherines Hall, Viola Public Library
Canal
Dolan Ditch, Eagle Ditch, Eliza Lake Ditch Cutoff, Frieden Ditch, Hampton Ditch, Ives Ditch, Main Ditch North, Prentis Ditch, School Ditch, Swan Lake Ditch
Cemetery
Aledo Cemetery, Alexis Cemetery, Artz Cemetery, Brick Cemetery, Bridger Cemetery, Brown Cemetery, Brownlee Cemetery, Brushwood Cemetery, Buffalo Prairie Cemetery, Cable Village Cemetery, Calvary Cemetery, Candor Cemetery, Carnahan Cemetery, Clancy Cemetery, Cooper Cemetery, Corns Cemetery, Davis Cemetery, Duncan Cemetery, Eliza Creek Cemetery, Farlows Grove Cemetery, Fender-Chapel Cemetery, Friends Cemetery, German Cemetery, Graham Cemetery, Gray Cemetery, Griffith Cemetery, Hamlet Cemetery, Hawkins Cemetery, Hopewell Cemetery, Jackson Cemetery, Keithsburg Cemetery, Kiddoo Cemetery, Latter Day Saint Cemetery, Leech Cemetery, Littlefield Cemetery, Lutheran Cemetery, Main Cemetery, Mann Cemetery, Mannon Cemetery, Martin Cemetery, Mathews Cemetery, McClintock Cemetery, McClure Cemetery, McClure Cemetery, McPherren Cemetery, Merryman Cemetery (historical), Miller Cemetery, Millersburg Cemetery, Mills Cemetery, Mount Vernon Cemetery, New Boston Cemetery, New Windsor Cemetery, North Henderson Cemetery, Norwood Cemetery, Oak Ridge Cemetery, Peniel Cemetery, Preemption Cemetery, Presbyterian Cemetery, Quaker Cemetery, Saint John's Cemetery, Saint Joseph's Cemetery, Saint Mary's Cemetery, Saint Mary's Cemetery, Sherrard Cemetery, Shields Cemetery, Sugar Grove Cemetery, Sunbeam Cemetery, Viola Cemetery, Western Cemetery
Church
Aledo Gospel Center, Antioch Church, Buffalo Prairie Church (historical), Calvary Lutheran Church, College Avenue Presbyterian Church, Enon Church (historical), First Apostolic Church, First Baptist Church, First Methodist Church, First United Presbyterian Church, Messiah Lutheran Church, Nazarene Church, New Life Assembly of God Church, Norwood Church, Ohio Grove Church (historical), Peniel Church, Perryton Church, Popes River Church, Saint Anthonys Church, Saint Catherines Church, Saint Johns Church, Saint Johns Church, Saint Joseph Church (historical), Sunbeam United Presbyterian Church, Trinity Presbyterian Church, Union Church, Viola United Church, Viola United Methodist Church
Civil
Mercer County, Township of Abington, Township of Duncan, Township of Eliza, Township of Greene, Township of Keithsburg, Township of Mercer, Township of Millersburg, Township of New Boston, Township of North Henderson, Township of Ohio Grove, Township of Perryton, Township of Preemption, Township of Richland Grove, Township of Rivoli, Township of Suez
Crossing
Army Ford
Dam
Dam and Lock Number 17, Dellitt Lake Dam, Fools Lake Dam, Fyre Lake Dam, Irwin Lake Dam, Karl Lake Dam, Lake Matherville Dam, Lake Nelson Dam, McCaw Pond Dam, Morrison Lake Dam, Renee Lake Dam, Swearingen Lake Dam
Gut
Half Moon Slough, Heiser Slough, Mapes Chute, Meyer Slough
Hospital
Mercer County Hospital
Island
Barkis Island, Bass Island, Bell Island, Bogus Island, Buzzard Island, Coleman Island, Island Number 347, Jonas Johnson Island, Mapes Island, Willow Bar Island
Lake
Glancey Lake (historical), Goose Pond (historical), Lower Eliza Lake (historical), Swan Lake, Upper Eliza Lake (historical)
Locale
Bay Island Pumping Station, Crosses Corner Access Area, Duncan Town Hall, Lloyd Hall, Mercer County Fair Ground, Mercer County Farm (historical), Oak View Country Club
Mine
Gilchrist Mine
Park
Brownlee Cemetery Prairie Nature Preserve, Central Park, Fenton Park, Keithsburg Historic District, Mark Twain National Wildlife Refuge, Miles Memorial Park, Monument Park, Northside Park
Populated Place
Aledo, Arpee, Boden, Burgess, Cable, Eliza, Gilchrist, Gingle Corners, Griffin, Hamlet, Joy, Keithsburg, Mannon, Marston, Martin (historical), Matherville, Millersburg, New Boston, New Windsor, North Henderson, Norwood, Ogle, Old Gilchrist, Orangemans Hall, Petersville, Preemption, Seaton, Shale City, Sherrard, Sugar Grove, Sunbeam, Swedona, Viola, Wanlock
Post Office
Aledo Post Office, Duck Creek Post Office (historical), Matherville Post Office, New Windsor Post Office, Preemption Post Office
Reservoir
Dellitt Lake, Fools Lake, Frye Lake, Irwin Lake, Karl Lake, Lake Matherville, Lake Nelson, McCaw Pond, Morrison Lake, Renee Lake, Swearingen Lake
School
Abington Center School (historical), Adams School (historical), Adams School (historical), Aledo Grammar School, Aledo High School, Aledo Junior High School, Aledo School Number 1 (historical), Apollo Elementary School, Barney School (historical), Bay View School (historical), Brownsville School (historical), Brush Hill School (historical), Brushwood School (historical), Calhoun School (historical), Carbon High School (historical), Center School (historical), Center School (historical), Centerville School (historical), Coal Dale School (historical), Duck Creek School (historical), Duff School (historical), Eliza Creek School (historical), Ethel School (historical), Eureka School (historical), Excelsor School (historical), Fairview School, Fairview School (historical), Frew School, Glancey School (historical), Green Summit School (historical), Greenbower School (historical), Harroun School (historical), Hazel Dell School, Hazel Dell School (historical), Hopewell School (historical), Kimmel School (historical), Lee School (historical), Legal Corner School (historical), Lewis School (historical), Lone Elm School (historical), Maple Grove School (historical), Maple Grove School (historical), Maple Ridge School (historical), Marsh School (historical), Marston School (historical), Matherville Elementary School, McKee School (historical), Merryman School (historical), Mount Vernon School (historical), New Salem School (historical), Oak Dale School (historical), Oakdale School (historical), Oakridge School, Ohio Grove School (historical), Old Gilchrist School (historical), Parker School (historical), Perryton School (historical), Pin Oak School (historical), Pioneer School (historical), Pleasant Hill School (historical), Pleasant Hill School (historical), Pleasant View School, Pleasant View School (historical), Point Pleasant School (historical), Prairie Flower School (historical), Prairie Rose School (historical), Prouty School (historical), Robb School (historical), Roosevelt Military Academy (historical), Rosedale School (historical), Scaly Point School (historical), Sedwick School (historical), Shadyside School (historical), Silver Lake School (historical), Stony Point School (historical), Streeter School (historical), Sunbeam School (historical), Sunnyside School (historical), Swan Lake School (historical), Union School (historical), Walnut Grove School (historical), Westmer Elementary School, Westmer High School, Westmer School, White Eagle School (historical), White Lily School, Winola Junior High School, Winola School, Winters Creek School (historical)
Stream
Big Chief Run, Bogus Chute, Camp Creek, Camp Creek, Cash Creek, Cleveland Slough, Coal Creek, Coleman Slough, Deerlick Branch, Dolan Creek, Donohue Run, Douglas Creek, Dugout Run, Edwards River, Eliza Creek, Goose Run, Illinois Slough, Irwin Branch, Keating Creek, Keg Slough (historical), Little Camp Creek, Mad River, Maids Run, North Camp Creek, North Pope Creek, Parker Run, Pike Run, Pope Creek, Skunk Creek, Snake Creek, Toms Creek, Wildcat Creek, Willow Slough, Winters Creek, Yankee Branch
Tower
WRMJ-FM (Aledo)
| Race | Population |
| White |  16,519 |
| Mixed | 119 |
| Black | 84 |
| Asian | 39 |
| American Indian | 24 |
| Hawaiian & Pacific Islander | 1 |
| Additional population tables : | |
| State population table | |
| Illinois population by county | |