Waterloo, Illinois
Waterloo is a city in Monroe County, Illinois, with an estimated population of 11,144 in 2023. It sits at 38.3412, -90.1527 in the America/Chicago time zone.
| Field | Value |
|---|---|
| Place name | Waterloo |
| Type | city |
| State | Illinois (IL) |
| County | Monroe County |
| Population (2023 est.) | 11,144 |
| Land area | 8.23 sq mi (21.33 km²) |
| Coordinates | 38.3412, -90.1527 |
| Time zone | America/Chicago |
| ZIP codes | 62298 |
ZIP codes and area codes for Waterloo
Waterloo covers 1 ZIP code: 62298. Browse all ZIP codes in Illinois for the full list.
Where is Waterloo?
Waterloo is located in Illinois, in Monroe County. The coordinates above can be pasted directly into any map service. The nearest indexed places are listed below, which is a useful check when two states share a place name.
Nearby places
Valmeyer 13 km · ILColumbia 14 km · ILMillstadt 14 km · ILHecker 14 km · ILSmithton 16 km · ILRed Bud 20 km · ILDupo 20 km · ILArnold 21 km · MO
Other places in Monroe County
Related
Frequently asked questions
What county is Waterloo, IL in?
Waterloo is in Monroe County, Illinois.
What is the population of Waterloo, IL?
The 2023 Census Bureau estimate is 11,144.
What time zone is Waterloo in?
Waterloo is in the America/Chicago time zone.