![]() Photo from Digital-Topo-Maps.com | Waterloo, IL 62298 Post Office Location: 303 East 3rd Street; Waterloo, IL Year Post Office built: Town(s) Served: New Athens Acceptable City Names: Waterloo Not Acceptable City Names: Burksville, Floraville, Foster Pond, Lou Del, Madonnaville, Monroe City, New Hanover, Paderborn, Saint Joe, St. Joe, Tipton, Wartburg Sectional Service Facility: St. Louis (Southeast) County(ies): Monroe, St. Clair Info on Waterloo: The City of Waterloo is the county seat of Monroe County. It is located on Illinois 3, and Illinois 156. The formation of the town goes back to the 1600's with French traders. Waterloo was laid out in 1818. In 1825 Waterloo became a county seat. |
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