Mercer is a town in Somerset County, Maine, home to about 718 people across 27 square miles. It has no ZIP code of its own: it’s part of 04957.
Homes sold for a median of $157 per square foot in the three months ending August 2026, a seller’s market.
Mostly Norridgewock; part is in Mercer
Each card is that ZIP code’s whole market, including any part outside Mercer. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Mercer’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)76 miles away |
|---|---|
| Closer regional airport | Augusta State Airport (AUG)26 miles away |
| Nearest city of 250,000+ | Boston, MA173 miles away |
| Nearest city of 1 million+ | New York, NY348 miles away |
Straight-line distances from the center of Mercer; 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.
Mercer had 709 residents in the 2020 census, up 10% since 2000.
It’s the 329th largest of 519 towns in Maine by population.
Somerset County grew from 33,849 residents in 1900 to 50,477 in 2020.
Somerset County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 79°F in summer, and winter lows average 6°F. About 41.8 inches of rain and melted snow fall in a typical year, with about 74 inches of snow.
Source: NOAA 1991–2020 climate normals, Madison, ME weather station (8 miles away).
12,763 jobs at 1,211 businesses in Somerset County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
10 doctors and other health care providers list an office in Mercer.
Nearest hospitals
Providers with an office here
| Primary care doctors | 5 |
|---|---|
| Nurse practitioners and physician assistants | 2 |
| Mental health providers | 3 |
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 (3 nearby)
Libraries (2 nearby)
Museums (1 nearby)
Counts are within about 3.5 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.
Public schools here are run by Rsu 54/Msad 54. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Mill Stream Elementary SchoolNorridgewock | Pre-K–5 | 309 | Public | 2.2 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 Norridgewock.
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.