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 FIPS 23011
- State
- Maine
- Country
- United States
- Coordinates
- 44.2208, -70.0263 — precision precise (locality)
View on OpenStreetMap - Population
- 3,493 (ZCTA, ACS 5-year)
- Population density
- 120 / sq mi
- Land area
- 29 sq mi (75.1 km²) (ZCTA, ACS 5-year)
- Median household income
- $94,868
- Per-capita income
- $43,834
- Median age
- 46.6
- Households
- 1,486
- Housing units
- 1,890
- Median home value
- $282,300
- Median gross rent
- $1,192 / month
- Congressional district
- ME-2 (119th Congress)
- USDA hardiness zone
- 5b (-15 to -10 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
- Area code
- 207Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 04259 with another ZIP · ZIPs within 25 miles · distance from 04259
Map of ZIP code 04259
Climate — monthly normals
Warmest month Jul (avg high 81°F), coldest Jan (avg low 9°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 30 | 33 | 42 | 54 | 66 | 75 | 81 | 80 | 72 | 60 | 47 | 36 |
| Avg low °F | 9 | 10 | 21 | 33 | 44 | 54 | 60 | 58 | 50 | 39 | 29 | 18 |
| Precip in | 3.6 | 3.0 | 3.7 | 4.2 | 3.7 | 4.4 | 3.4 | 3.6 | 3.9 | 5.4 | 4.5 | 4.4 |
NOAA 1991–2020 climate normals from the nearest station: GARDINER (11.7 mi) · NOAA NCEI
Places in ZIP 04259
- 1 schools
- 1 restaurants & cafés
- 2 parks
- 2 playgrounds
- 1 post offices
- 1 places of worship
- 2 banks
- 2 gas stations
- 3 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
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) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page