Monroe County Map
The County of Monroe is located in the State of Illinois. Find directions to Monroe County, browse local businesses, landmarks, get current traffic estimates, road conditions, and more. According to the 2020 US Census the Monroe County population is estimated at 34,739 people. The Monroe County time zone is Central Daylight Time which is 6 hours behind Coordinated Universal Time (UTC).
Nearby counties include Randolph County, St. Clair County, Jefferson County, Ste. Genevieve County, St. Louis County.
Top cities include Waterloo, Columbia, Valmeyer, Hecker, Maeystown