WELCOME TO MONROE COUNTY, ILLINOIS
Road Closure Announcements
- 7/18/2025 – Wiegand Road has reopened. Please use extreme caution as road construction is ongoing.
- Bluff Road at its crossing of Carr Creek near Columbia will be restricted to 1 lane beginning on or around May 28th. The closure will be signalized. In addition, Valmeyer Road at the intersection of Bluff Road will be closed to all traffic beginning on May 28th. Please expect delays and use extreme caution when travelling Bluff Road during this time.
Monroe/Randolph County Enterprise Zone 2024
The new 2024 information is accessible by clicking this link.
GIS MAPS AND APPS
GIS has created some new user friendly maps/apps. Click the link above to check them out.
Welcome to Monroe County, Illinois
The lush rolling hills and fertile farmland in Monroe County make it a wonderful location to raise a family. With a population of just under 34,000, it boasts numerous picturesque communities including the larger towns of Columbia, Waterloo (county seat), Valmeyer, Hecker, as well as other smaller quaint villages such as Maeystown and Fults.
Founded in 1816 and named for James Monroe, Monroe County is located in Southwest Illinois and is bordered on the west by the Mississippi river. Geographically the county is located just 11 miles to the south east of St. Louis Missouri.
Featured Upcoming Events Shown Below
To view full calendar events visit our Events page.
County Board Meeting
July 21 @ 8:15 am - 10:30 amSheriff Sale for Foreclosure
July 22 @ 11:00 am - 12:00 pmWaterloo Municipal Band Concert
July 22 @ 8:00 pm - 10:00 pmFountain Water District
July 28 @ 8:00 pm - 10:00 pmWaterloo Municipal Band Concert
July 29 @ 8:00 pm - 10:00 pm