Winthrop is a town in Kennebec County, Maine, home to about 6,191 people across 31 square miles. Its ZIP code is 04364.
Homes sold for a median of $234 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside Winthrop. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Winthrop’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)50 miles away |
|---|---|
| Closer regional airport | Augusta State Airport (AUG)8 miles away |
| Nearest city of 250,000+ | Boston, MA147 miles away |
| Nearest city of 1 million+ | New York, NY324 miles away |
Straight-line distances from the center of Winthrop; 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.
Winthrop had 6,121 residents in the 2020 census, down 2% since 2000.
It’s the 52nd 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 41.8 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Augusta State Ap, ME weather station (8 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).
49 doctors and other health care providers list an office in Winthrop.
Nearest hospitals
Providers with an office here
| Primary care doctors | 9 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 1 |
| Nurse practitioners and physician assistants | 8 |
| Mental health providers | 19 |
| Physical and occupational therapists | 5 |
| Chiropractors | 6 |
| Pharmacies | 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 (5 nearby)
Grocery stores (1 nearby)
Pharmacies (1 nearby)
Libraries (1 nearby)
Museums
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.
Public schools here are run by Winthrop Public Schools. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Winthrop Grade SchoolWinthrop | Pre-K–5 | 372 | Public | 1.3 mi |
| Winthrop Middle SchoolWinthrop | 6–8 | 193 | Public | 2.0 mi |
| Winthrop High SchoolWinthrop | 9–12 | 241 | Public | 2.1 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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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.