What city is ZIP code 04259?

ZIP code 04259 is in Winthrop, ME (Kennebec County).

What county is ZIP code 04259 in?

ZIP code 04259 is mostly in Kennebec County, Maine.

How many people live in ZIP code 04259?

About 3,610 people live in the 04259 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Checked Oct 26, 2026

ZIP Code 04259

Winthrop, ME, Kennebec County

Population

3,610

Land area

29sq mi

People per sq mi

124

City

Winthrop

ZIP 04259 and nearby ZIP codes

Full map

ZIP 04259 at a glance

ZIP 04259 (Winthrop) is about 2.8 times as dense as Maine as a whole.
The median household income is $83,919, 12% above the Maine median of $74,733.
A typical owner-occupied home is valued at $298,300 and median rent is $1,249 a month.

Local data for ZIP 04259

Counts from official public data

Housing and community stats

ZIP 04259, American Community Survey 2020-2024

Full profile

Median household income

$83,919

Poverty rate

8.1%

Median home value

$298,300

Prices -7.5% in a year

Median rent

$1,249/mo

Homeownership

78.0%

Bachelor's or higher

34.6%

Median age

46.0

Average commute

28.7 min

Income, education and commute

Economy and federal money

Businesses, pandemic loans and political donations

Details

Business establishments

ZIP Business Patterns 2023

Employees

279

$16.2M annual payroll

PPP loans

$2.1M

64 loans

Campaign donations

$14K

59% D, 37% R, 2026 cycle

PPP loans in this ZIP

Environment and hazard risk

ZIP 04259, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Low

Top: winter weather

Storm events since 1996

646

Countywide, mostly thunderstorm wind

Flood insurance policies

249

0.5% of homes, county

July high / Jan low

81° / 9°F

47.7 inches of rain a year

Hazards, floods and storm history Check a flood zone

Health statistics

Share of adults in ZIP 04259, CDC PLACES estimates

All 40 measures

Obesity

31.8%

U.S. 33.3% -1.5 pts

Diabetes

10.8%

U.S. 12.1% -1.3 pts

Smoking

14.2%

U.S. 12.8% +1.4 pts

Uninsured (18-64)

6.8%

U.S. 11.1% -4.3 pts

Frequently asked questions

What city is ZIP code 04259?: ZIP code 04259 is in Winthrop, ME (Kennebec County).
What county is ZIP code 04259 in?: ZIP code 04259 is mostly in Kennebec County, Maine.
How many people live in ZIP code 04259?: About 3,610 people live in the 04259 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.