Monmouth zip code
Zip code in Monmouth, IL
The location Monmouth belongs to Warren County, state of Illinois. Monmouth has been assigned with the zip code 61462.
Monmouth is the official name of the location so if you want to use the US Postal Service you must use that name.
| Zip code | Type | Population |
|---|---|---|
| 61462 | STANDARD | 9,560 |
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