Monroe County, Administrative division in southwestern Illinois, United States.
Monroe County spans 398 square miles of land, featuring limestone bluffs, numerous sinkholes, caves, and springs along the Mississippi River floodplain.
The county, established in 1816 and named after James Monroe, developed from French settlements including St. Philippe, founded in 1723 by Philippe François Renault.
The county maintains strong connections to its German and Irish heritage, reflected in local traditions and community celebrations throughout its municipalities.
The county seat of Waterloo provides administrative services, while Interstate 255 and Highway 50 connect residents to the St. Louis metropolitan area.
The region contains approximately 500 limestone sinkholes within its karst landscape, creating a distinct geological formation in Illinois.
Location: Illinois
Inception: January 6, 1816
Capital city: Waterloo
Shares border with: St. Clair County, Ste. Genevieve County, Randolph County, Jefferson County, St. Louis County
Website: http://monroecountyil.org
GPS coordinates: 38.28000,-90.18000
Latest update: March 19, 2025 06:18
Jefferson Barracks Military Post
25.5 km
Jefferson Barracks National Cemetery
26.2 km
Cliff Cave County Park
22.4 km
Illinois Caverns State Natural Area
6.2 km
Jefferson Barracks Bridge
24.6 km
Cathedral of Saint Peter
30.6 km
Kolmer Site
21 km
Lunsford-Pulcher Archeological Site
24.3 km
Koch, Missouri
24.3 km
William and Florence Schmidt Art Center
34.7 km
Gov. Daniel Dunklin's Grave State Historic Site
17.3 km
Gustave Koerner House
31.4 km
Fountain Creek Bridge
5.3 km
Belleville Historic District
31.4 km
St. Clair County Courthouse
31 km
Gustave Greystone-Meissner House
17.7 km
Windsor Harbor Road Bridge
18.5 km
Waterloo Historic District
6.6 km
Gundlach-Grosse House
18.8 km
Kimmswick Historic District
18.8 km
Red Bud Historic District
18.1 km
Turkey Hill Grange Hall
30.4 km
Hotel Belleville
31.1 km
West Park Bowl
18.5 km
Dupo Park Splash Pad
26.4 km
Jefferson Barracks
26.4 km
Kidd Lake State Natural Area
15.1 km
Lincoln Theatre
31.2 kmReviews
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