Facility record / Illinois
Monroe County Jail
Monroe County Jail is a county or city jail in Waterloo, Monroe County, Illinois. It has a rated capacity of 30. By capacity it is the 74th-largest of the 94 county or city jail records listed for Illinois with a published capacity.
Jail411 does not hold custody records. A listing here does not mean anyone is held at this address. Confirm the person’s location with the responsible agency before you travel, send money, or pay for a service.
Where this record came from. The contact, status and security fields, with capacity and population, come from the HIFLD and Federal Bureau of Prisons directory release refreshed February 2026. They describe the record, not today’s population. Check the facility’s current official website.
Contact this facility
- Phone
- (618) 939-8651
- Address
- 225 East Third Street
Waterloo, IL 62298Open in maps - Official page
- Official page at ilsheriff.org
- County
- Monroe County
Facility details
Listed as open in the February 2026 directory release.
Finding someone held here
Use the county system for a recent arrest. A state corrections search covers people in state custody. It generally will not list someone booked into a county jail this week. Bookings, bail, release, and visiting are all handled by Monroe County Sheriff’s Office.
Official site for this facility →
Call this facility directly: (618) 939-8651
Before you travel, pay, or mail anything
Get two things first: which facility the person is actually in, and their booking or ID number. Almost nothing works without them. Then check this facility’s current instructions — rules and service providers change.