Residential delivery area · Maine
ZIP Code 04364: Winthrop, ME
ZIP code 04364 uses the postal name Winthrop, Maine and lies entirely in Kennebec County (Census 2020 ZIP-county file). About 6,200 people live there (Census Bureau, ACS 2020-2024). Median household income is $86,470 (Census Bureau, ACS 2020-2024). By Census place, 18% of its land lies in Winthrop (a census-designated place); 82% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Winthrop · its only residential ZIP
- County
- Kennebec County
- Census places
- Winthrop census-designated place
- Micro area
- Augusta-Waterville, ME
- House district
- ME-2 119th Congress
- State
- Maine
- Time zone
- Eastern
- Land area
- 31.1 sq mi · 199 people per sq mi
Where is ZIP code 04364?
04364 centers on 44.310°, -69.963° and covers 31.1 square miles of land plus 6.7 of water. It borders 6 ZIP codes: 04265, 04284, 04355, 04351, 04259, 04345.
The map draws ZIP code areas only. For the streets inside 04364, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 04364 compare with the rest of Kennebec County?
| Measure | 04364 | In Kennebec County | In ME |
|---|---|---|---|
| People (ACS 2020-2024) | 6,191 | 5th of 27 | 56th of 426 |
| Median household income | $87k | 5th of 17 | 57th of 200 |
| Median home value | $295k | 7th of 22 | 93rd of 242 |
Its median household income is higher than in 70% of U.S. residential ZIP codes, and it is denser than 63% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 04364?
The 2020 Census counted 6,115 people in 04364; the ACS, which samples households over 2020-2024, estimates 6,191. Between the 2010 and 2020 censuses its population grew 1.5% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 6,191
- 2020 Census count
- 6,115+1.5% since 2010 (6,025)
- Households
- 2,522
- Median age
- 43.6
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 04364?
Of the 6,191 people the ACS estimates in 04364, 22.9% are under 18 and 23.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (91.0%).
- Under 1822.9%
- 18 to 6453.7%
- 65 and older23.4%
- White, not Hispanic91.0%
- Other or two or more6.3%
- Black, not Hispanic1.7%
- Hispanic or Latino0.5%
- Asian, not Hispanic0.5%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 04364 earn?
Median household income is $86,470 (ACS 2020-2024), the 5th highest of the 17 ranked ZIP codes in Kennebec County. It is not measurably different from 2015-2019 ($87,510 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $86,470
- Income per person
- $39,714
- Below the poverty line
- 12.9%
- Unemployed (of the labor force)
- 3.1%
- Adults 25+ with a bachelor's degree
- 40.0%
- Adjusted gross income per tax return, 2022
- $84,1673,130 returns; wages 61% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 04364?
FHFA's house price index for 04364, built from repeat sales and appraisals of the same homes, rose 96% from 2015 to 2025 and rose 77% from 2020 to 2025, and moved +3.1% in 2025.
- Median home value (owners' estimate)
- $294,800
- Median gross rent
- $892
- Homes owned by their occupants
- 92.5%
- Housing units
- 3,354
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 04364?
163 business establishments had a location in this ZIP code in 2023, 1 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction24
- Health care and social assistance23
- Retail trade17
- Professional, scientific, and technical services17
- Other services (except public administration)17
- Administrative and support and waste management and remediation services11
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 04364?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 04265 | North Monmouth | 552 | $44k | 4.2 mi |
| 04284 | Wayne | 1,101 | $93k | 4.6 mi |
| 04355 | Readfield | 2,651 | $87k | 5.2 mi |
| 04351 | Manchester | 2,424 | $92k | 5.5 mi |
| 04259 | Monmouth | 3,610 | $84k | 5.9 mi |
| 04345 | Gardiner | 12,579 | $77k | 11.5 mi |
| 04347 | Hallowell | 2,592 | $68k | 7.3 mi (near) |
| 04344 | Farmingdale | 3,017 | $72k | 7.5 mi (near) |
| 04263 | Leeds | 2,285 | $85k | 8.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.