Monmouth, IL ZIP code
The ZIP code for Monmouth, Illinois is 61462. It is in Warren County.
- Population in these ZIPs
- 10,458
- Avg. median income
- $64,100population-weighted
- Typical home value
- $112,000population-weighted
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Monmouth, IL ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 61462 | 10,458 | $64,113 | $112,000 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Monmouth
- Kirkwood 6 mi
- Gerlaw 7 mi
- Cameron 8 mi
- Little York 9 mi
- Berwick 11 mi
- Smithshire 12 mi
- Biggsville 12 mi
- Alexis 12 mi
- Galesburg 14 mi
- Oquawka 14 mi
- Roseville 14 mi
- Abingdon 14 mi
Frequently asked questions
What is the ZIP code for Monmouth, IL?
The ZIP code for Monmouth, IL is 61462.
What county is Monmouth, Illinois in?
Monmouth ZIP codes are in Warren County.