Monmouth is a town in Kennebec County, Maine, home to about 4,162 people across 34 square miles. Its ZIP codes are 04259 and 04265.
Homes sold for a median of $208 per square foot across 2 ZIP codes in the three months ending August 2026, and 1 of 2 were seller’s markets.
All in Monmouth
Mostly Monmouth; also Wayne
Each card is that ZIP code’s whole market, including any part outside Monmouth. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Monmouth’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Portland International Jetport (PWM)43 miles away |
|---|---|
| Closer regional airport | Augusta State Airport (AUG)13 miles away |
| Nearest city of 250,000+ | Boston, MA140 miles away |
| Nearest city of 1 million+ | New York, NY317 miles away |
Straight-line distances from the center of Monmouth; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Monmouth had 4,066 residents in the 2020 census, up 7% since 2000.
It’s the 86th largest of 519 towns in Maine by population.
Kennebec County grew from 59,117 residents in 1900 to 123,642 in 2020.
Kennebec County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 80°F in summer, and winter lows average 12°F. About 45.1 inches of rain and melted snow fall in a typical year, with about 65 inches of snow.
Source: NOAA 1991–2020 climate normals, Lewiston, ME weather station (13 miles away).
49,617 jobs at 3,318 businesses in Kennebec County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
22 doctors and other health care providers list an office in Monmouth’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 3 |
|---|---|
| Nurse practitioners and physician assistants | 5 |
| Mental health providers | 8 |
| Physical and occupational therapists | 5 |
| Chiropractors | 1 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (2 nearby)
Grocery stores
Pharmacies
Libraries
Museums (1 nearby)
Theaters and performance venues (1 nearby)
Counts are within about 4 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1776.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Rsu 02. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Monmouth Memorial SchoolMonmouth | Pre-K–8 | 363 | Public | 1.7 mi |
| Monmouth AcademyMonmouth | 9–12 | 192 | Public | 1.6 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Wayne.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.