ZIP code · Monmouth · Maine · United States
ZIP code 04259 — Monmouth
ZIP code 04259 serves Monmouth, Maine.
- Postal code
- 04259Single source Value from one source, not cross-checked.
- City
- Monmouth
- County
- Kennebec
- State
- Maine
- Country
- United States
- Coordinates
- 44.2208, -70.0263 — precision precise (locality)
View on OpenStreetMap - Population
- 3,493 (ZCTA, ACS 5-year)
- Median household income
- $94,868
- Median age
- 46.6
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Nearby localities
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS). Data generated on 2026-08-21. Methodology · Report an error on this page