ZIP Codes of Washington County, ME

Population & People
Population & People
Total Population
31,668
Household Income
Household Income
Median Income
$58,035
Housing
Housing
Total Housing Units
22,196
Business & Economy
Business & Economy
Total Businesses
842
Employment
Employment
Employment Rate
49.24%
Education
Education
Bachelor's Degree+
24.66%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 32 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:32 ZIP Codes (28 Standard, 4 PO Box, 0 Unique) [See All]
Area Code:207
Timezone:Eastern (GMT -05:00)
Local Time:11:53:48 PM
Population:31,668 [See All]
FIPS:23029
Land Area:2,685 sq mi
Water Area:483 sq mi
Coordinates:44.9476, -67.5180
Quick Link:
https://www.zip-codes.com/county/me-washington.asp
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Wide geographic spread
ZIPs range from 341.4 sq mi down to 3.45 — a 99× sprawl ratio.

Standout ZIPs in this County


Most Populous
Machias · 3,340 people
10.5% of county total
Highest Income
Steuben · $76,466 median
1.3× county average
Largest Land Area
Cherryfield · 341.4 sq mi
Spans the most ground
Fastest Growth
Steuben · 36.5% (10-yr)
1,017 → 1,388 residents
Most Educated
Eastport · 36.2% bachelor's+
373 of 1,030 adults 25+

Things worth knowing about Washington County


31,668 residents live across 32 ZIPs covering 2,685 sq mi, served by 32 distinct USPS-recognized cities.

Population moved from 32,484 to 31,668 from 2014 to 2024 — a -2.5% change. 16 ZIPs gained residents, 15 lost.

The county's wealthiest ZIP 04680 (Steuben, $76,466 median) and poorest ZIP 04622 (Cherryfield, $43,854) are 20.4 miles apart — a 1.7× income gap across local geography.

Median home values vary 3.7× across this county — from $69,700 in 04686 (Wesley) to $256,700 in 04611 (Beals).

Density varies 265× across the county — from 1 people/sq mi in 04490 (Topsfield) to 366 in 04631 (Eastport).

Educational attainment ranges from 12.3% bachelor's+ in 04424 (Danforth) to 37.6% in 04611 (Beals) — the breadth of educational profiles across the area.

Within Maine, this is the #14 most populous of 16 counties and ranks #14 for median household income .

Weighted by population, the typical household earns about $58,034 across the county — reflecting what a typical resident sees, not a simple ZIP average.

24.7% of adults age 25+ hold a bachelor's degree or higher (5,813 of 23,569 reporting).

28 Standard delivery, 4 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Washington County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
2,685
square miles
Avg density
11.8
people per sq mi
Population
31,668
across 32 ZIPs
Cherryfield
341.4 sq mi
1,050 residents
Princeton
309.4 sq mi
2,010 residents
Baileyville
171.2 sq mi
2,155 residents

All ZIP Codes in Washington County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
04654MachiasStandard3,340$48,838104.91.8%
04619CalaisStandard3,097$64,09638.81.1%
04694BaileyvilleStandard2,155$65,417171.2-2.3%
04668PrincetonStandard2,010$48,720309.421.8%
04652LubecStandard1,525$52,08361.3-21.5%
04680SteubenStandard1,388$76,46643.336.5%
04667PerryStandard1,296$74,71232.3-19.6%
04631EastportStandard1,263$45,5733.4-10.7%
04630East MachiasStandard1,230$57,85779.3-10.9%
04658MilbridgeStandard1,222$60,53623.7-13.3%
04666PembrokeStandard1,178$60,76175.41.6%
04623Columbia FallsStandard1,173$50,163152.7-16.1%
04649JonesportStandard1,166$67,50025.3-5.9%
04622CherryfieldStandard1,050$43,854341.4-25.7%
04606AddisonStandard1,045$50,52448.5-10.7%
04655MachiasportStandard1,016$60,00020.3-14.3%
04424DanforthStandard983$48,778142.232.8%
04643HarringtonStandard917$64,86132.3-10.3%
04671RobbinstonStandard621$68,33333.816.5%
04628DennysvilleStandard582$52,159101.3-9.8%
04648JonesboroStandard570$63,75039.715.2%
04691WhitingStandard499$55,16455.98.0%
04611BealsPO Box498$64,06310.92.7%
04626CutlerStandard492$72,94646.65.1%
04686WesleyStandard328$52,353149.6326.0%
04657MeddybempsStandard326$49,19177.512.8%
04490TopsfieldStandard228$45,893165.0-5.8%
04492WaiteStandard175$63,438122.70.6%
04413BrooktonStandard162$55,000112.50.6%
04491VanceboroPO Box12211.39.9%
04454Lambert LakePO Box1152.9-72.5%
04637Grand Lake StreamPO Box0.0

Adjacent & Nearby Counties