Monmouth ZIP code, Iowa
The ZIP code for Monmouth, IA is 52309, and its area code is 563.
- USPS city name
- 1 ZIP code
- Population
- 121
- Area code
- 563
- County
- Jackson County
- State
- Iowa
NANPA lists no telephone rate centre for Monmouth itself, so these are the area codes of the nearest one, Baldwin (4.0 miles). A town on an area-code boundary can differ from its neighbour.
ZIP codes addressed as Monmouth
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
52309 | Monmouth , IA | Standard | 443 | $56,250 | $155,400 |
Map of Monmouth ZIP codes
The ZIP codes of Monmouth, IA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Towns near Monmouth
The nearest larger towns are Baldwin (153 people, 2.2 mi), Wyoming (525 people, 6.4 mi) and Onslow (284 people, 7.2 mi).
| Town | Population | Distance |
|---|---|---|
| Maquoketa | 6,075 | 11.2 mi |
| Monticello | 4,071 | 18.9 mi |
| Anamosa | 5,629 | 20.3 mi |
| Tipton | 3,106 | 24.6 mi |
| DeWitt | 5,546 | 24.6 mi |
| Mount Vernon | 4,513 | 29.8 mi |
More nearby: every ZIP code in Jackson County · Iowa ZIP codes
Cite this page
zipcodes.pro. “Monmouth, IA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ia/monmouth
Underlying data is public domain or openly licensed — sources, vintages and licences.