Monroe County Illinois - Government Site
Population: 31,876
Area: 388 square miles
County Seat: Waterloo
Area Code(s) in use: 618
Time Zone: CST
Adjacent counties:
City of St. Louis (MO) Jefferson (MO) Randolph St. Clair St. Louis (MO) Ste. Genevieve (MO)
Airport
Columbia Airport, Crook RLA Airport, Jacobs Landing Strip, King Airport, Our Lady Immaculata Airport, Quint/King Heliport, Ralph Jacobs Airport, Smith Landing Strip, Smith RLA Airport
Bridge
Jefferson Barracks Bridge
Building
Monroe County Courthouse, Morrison-Talbott Library
Canal
Fults Creek Ditch, Selma Ditch
Cape
Penitentiary Point
Cemetery
Brickey Cemetery, Burksville Cemetery, City Cemetery, Deer Hill Cemetery, Devore Cemetery, Dick Cemetery, Eagle Cliff Cemetery, Eilers Cemetery, Fanning Joseph Cemetery, Flatford Cemetery, Gaines Cemetery, Gibbons Cemetery, Gilmore Cemetery, Grant Pass Cemetery, Gravel Springs Cemetery, Hall John W Cemetery, Halligan Rosa Cemetery, Harvey Cemetery, Hecker Cemetery, Hembough John Cemetery, Hembrough Richard Cemetery, Hoagland Louisa Cemetery, Holy Cross Cemetery, Holy Cross Cemetery, Holy Cross Cemetery, Horrell Cemetery, Huffaker Cemetery, Immaculate Conception Cemetery, Immanuel Cemetery, Jameserson Cemetery, Koch Cemetery, Kolmer Cemetery, Lemen Cemetery, Madonnaville Cemetery, Martini Cemetery, McConkey Cemetery, Monroe City Cemetery, Moores Cemetery, New Design Historical Cemetery, New Hanover Cemetery, Palmer Cemetery, Rebenack Cemetery, Saint Johns Cemetery, Saint Johns Cemetery, Saint Johns Cemetery, Saint Marcus Cemetery, Saint Marys Cemetery, Saint Pauls Cemetery, Saints Peter and Paul Cemetery, Shoemaker Cemetery, Studt Cemetery, Wallace Cemetery, Woodson Garden Cemetery, Zion Cemetery
Church
Bethany United Church, Church of God, Concord Presbyterian Church, Deer Hill Church, First Baptist Church of Waterloo, First Church, Friedens United Church of Christ, Holy Cross Church, Immanuel Church (historical), Immanuel Lutheran Church, Johanna Church (historical), Kingdom Hall, Saint Augustine Catholic Church, Saint Johns Church (historical), Saint Marcus Chapel, Saint Pauls Church, Saints Peter and Paul Catholic Church, Salem Church, The Church of Jesus Christ of Latter Day Saints, Tiptown Church (historical), Zoar Church
Civil
Monroe County, Precinct 1 Election Precinct, Precinct 10 Election Precinct, Precinct 11 Election Precinct, Precinct 12 Election Precinct, Precinct 13 Election Precinct, Precinct 14 Election Precinct, Precinct 15 Election Precinct, Precinct 16 Election Precinct, Precinct 17 Election Precinct, Precinct 18 Election Precinct, Precinct 19 Election Precinct, Precinct 2 Election Precinct, Precinct 20 Election Precinct, Precinct 21 Election Precinct, Precinct 22 Election Precinct, Precinct 23 Election Precinct, Precinct 24 Election Precinct, Precinct 25 Election Precinct, Precinct 26 Election Precinct, Precinct 27 Election Precinct, Precinct 28 Election Precinct, Precinct 29 Election Precinct, Precinct 3 Election Precinct, Precinct 30 Election Precinct, Precinct 31 Election Precinct, Precinct 32 Election Precinct, Precinct 33 Election Precinct, Precinct 34 Election Precinct, Precinct 35 Election Precinct, Precinct 36 Election Precinct, Precinct 37 Election Precinct, Precinct 4 Election Precinct, Precinct 5 Election Precinct, Precinct 6 Election Precinct, Precinct 7 Election Precinct, Precinct 8 Election Precinct, Precinct 9 Election Precinct
Crossing
Interchange 6
Dam
Columbia Sportsman Club Lake Dam, Hill Lake Dam, Illinois No Name Number 2020 Dam, Illinois No Name Number 2027 Dam, Lake Emmett Dam, Lake Loudel Dam, Lake Mildred Dam, Lake Ronnie Dam, Waterloo New Reservoir Dam, Waterloo Reservoir Number 1 Dam, Waterloo Reservoir Number 2 Dam, Waterloo Sportsman Club Lake Dam Number 1, Waterloo Sportsman Club Lake Dam Number 2
Gut
Lucas Slough
Island
Beagles Island, Calico Island, Carroll Island (historical), Meissner Island
Lake
Beaver Lake, Bissell Lake, Branch Lake (historical), Fish Lake, Foster Pond, Fox Lake, Gilmore Lake, Hill Lake (historical), Howe Lake (historical), Island Lake, Lake Mildred, Long Lake, Luhrwood Lakes, Moredock Lake, Porter Lake, Rainer Lake, Saunders Lake (historical), Sawmill Lake, Shaus Lake, Steppig Lake, Stubblefield Lake, Timber Lake, Twin Lakes, Vogt Lake, Waddle Lake (historical), Wetzler Lake
Locale
Camp Vanderventer, Camp Wartburg, Harrisonville Landing, Kemper Landing, Maeys, New Hanover Station, Renault Station
Military (Historical)
Nike Site SL-40C (historical), Nike Site SL-40L (historical)
Park
Bolm Schkraft Park, Fogelpole Cave Nature Preserve, Fults Hill Prairie Nature Preserve, Illinois Caverns State Natural Area, Maeystown Historic District, Waterloo Historic District
Populated Place
Ames, Burksville, Burksville Station, Chalfin Bridge, Columbia, Foster Pond (historical), Fountain, Fountain Gap, Fults, Harrisonville, Hecker, Ivy, Kidd, Kise Crossing, Lemens, Madonnaville, Maeystown, Merrimac, Millstadt Junction, Mitchie, Monroe City, New Hanover, Renault, Saint Joe, Tipton, Valmeyer, Warnock, Wartburg, Waterloo, Woodville (historical)
Post Office
Columbia Post Office, Renault Post Office, Valmeyer Post Office, Waterloo Post Office
Reservoir
Columbia Sportsman Club Lake, Hill Lake, Lake Emmett, Lake Loudel, Lake Ronnie, Stone Lake, Waterloo New Reservoir, Waterloo Reservoir Number 1, Waterloo Reservoir Number 2, Waterloo Sportsman Club Lake
Ridge
Tamarawa Ridge
School
Baum School (historical), Blackburn School (historical), Bluff School (historical), Boxtown School (historical), Brickey School (historical), Burksville School (historical), Central School, Clifford School (historical), Collier School (historical), Columbia Elementary School, Columiba High School, Copp School (historical), Deer Hill School (historical), Etter School (historical), Gall School (historical), Gibault High School, Goeddeltown School (historical), Grant School (historical), Hayden School (historical), Holcomb School (historical), Holy Cross School, Kennif School (historical), Kirsch School (historical), Lohrberg School (historical), Long Lake School (historical), Martini School (historical), Maus School (historical), McBride School (historical), McQuillan School (historical), Miles Hollow School, Mitchie School (historical), Mueller School (historical), O'Leary School (historical), Oak Grove School (historical), Old Rock School, Poe School (historical), Portland School, Posten School (historical), Riverview School (historical), Rockhouse School, Round Prairie School (historical), Saint Augustine Catholic School, Sand Bank School (historical), Sand Hill School (historical), Schroeder School (historical), Shoemaker School (historical), Stringtown School (historical), Upper School (historical), Valmeyer Community School, Varnum School (historical), W J Zahnow Elementary School, Walnut Grove School, Waterloo High School, Waterloo Junior High School, Yankeetown School (historical)
Spring
Terry Spring
Stream
Andys Run, Bond Creek, Bradley Branch, Carr Creek, Dry Fork, Dry Run, Fountain Creek, Fults Creek, Gerhardt Creek, Hesterburg Creek, Hill Creek, Hill Lake Creek, Kopp Creek, Little Carr Creek, Long Slash Creek, Maeystown Creek, Monroe City Creek, Old Maeystown Creek, Onemile Race Creek, Palmer Creek, Palmer Creek, Palmer Creek, Prairie Branch, Prairie du Long Creek, Richland Creek, Rockhouse Creek, Rocky Branch, South Fork Horse Creek, Walters Creek, Wilson Creek
Summit
Potato Hill
Swamp
Cavanah Lake
Valley
Dennis Hollow, Monroe City Hollow, Morrison Hollow, Schaeffer Hollow, Trout Hollow
| Race | Population |
| White |  31,483 |
| Mixed | 137 |
| Asian | 121 |
| Black | 80 |
| American Indian | 52 |
| Hawaiian & Pacific Islander | 3 |
| Additional population tables : | |
| State population table | |
| Illinois population by county | |