Washington County, Maine Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 14th-largest in Maine
The population of Washington County, Maine is 31,261 as of the 2023 American Community Survey, making it the 14th-largest county in Maine. The median household income is $52,237, the median home value is $147,100, and the median age is 48.6.
The population of Washington County has declined 4.4% since 2010 (32,828 → 31,383), a -0.32% annualized rate.
31,261
Population
-0.32%
Annual growth
12
People / sq mi
$52,237
Median Income
$147,100
Median Home Value
Washington County covers 2,563 sq mi of land at 12.2 people per square mile.
About Washington County, ME
Age is the most distinctive thing about Washington County: a median age of 48.6, older than the national median. With 31,261 residents, Washington County is a county in Maine. It ranks #14 among counties in Maine by population.
The typical household earns $52,237, below the US median of $78,538. The poverty rate is 12.5%, close to the national 12.4%. Homes carry a median value of $147,100, with typical rent around $768.
24.9% of adults 25 and older hold a bachelor’s degree, below the national average of 35.0%. Around 10.0% of workers work from home, below the national 14.0%, and the average commute runs about 22 minutes each way.
The age structure shapes everything downstream in Washington County — from housing demand to the mix of working-age earners reflected in the income figures above.
Washington County Population History (2010-2024)
The county of Washington County had a population of 32,828 in 2010 and 31,383 in 2024, a -4.4% growth over 14 years. The peak was 32,828 in 2010. Average annual growth rate: -0.32%.
31,383
Population (2024)
32,828
Population (2010)
32,828
Peak (2010)
-0.32%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 32,828 |
| 2011 | 32,724 |
| 2012 | 32,553 |
| 2013 | 32,268 |
| 2014 | 31,971 |
| 2015 | 31,783 |
| 2016 | 31,608 |
| 2017 | 31,370 |
| 2018 | 31,152 |
| 2019 | 31,286 |
| 2020 | 31,108 |
| 2021 | 31,213 |
| 2022 | 31,507 |
| 2023 | 31,446 |
| 2024 | 31,383 |
Race & Ethnicity
| White | 88.5% |
| Black or African American | 1.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 6.7% |
| Two or More Races | 0.0% |
Age & Sex
48.6
Median Age
50.7%
Female
49.3%
Male
25.8%
Age 65+
Age Distribution
Children (under 15): 15.1% · Seniors (65+): 25.8%
Income & Poverty
| Median household income | $52,237$-19,536 vs state |
| Mean household income | $71,586 |
| Per-capita income | $32,459 |
| Poverty rate | 12.5%+6.0% vs state |
| Unemployment rate | 3.5% |
| Employment-to-population | 48.9% |
Top Industries by Employment
The largest employment sector in Washington County is professional & business services, accounting for 29.9% of workers.
How residents commute
0.2%
Drive alone
3.6%
Carpool
75.2%
Public transit
10.0%
Work from home
21.6 min
Avg commute
Housing
$147,100$-119,300 vs state
Median home value
$768
Median rent
78.1%
Homeownership rate
21,703
Total housing units
64.5%
Occupied
35.5%
Vacant
21.9%
Renter-occupied
Social & access
90.2%
With health insurance
90.0%
With broadband internet
31.2%
Foreign-born
12.2%
Veterans (18+)
23.4%
With a disability
94.6%
Speak language other than English at home
Education
91.2%
High School+
24.9%
Bachelor's+
Largest cities in Maine
Other counties in Maine
Part of Maine
Metro areas in Maine
County rankings
Frequently Asked Questions
Washington County, Maine has a population of 31,261 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 14th-largest county in Maine. Population density is 12 people per square mile.
The population of Washington County has declined 4.4% since 2010 (32,828 → 31,383), a -0.32% annualized rate.
The median household income in Washington County, Maine is $52,237, with mean (average) household income of $71,586 and per-capita income of $32,459. 12.5% of residents live below the federal poverty level.
In Washington County, the largest racial and ethnic groups are White (88.5%), Hispanic or Latino (6.7%), Black or African American (1.0%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Washington County, Maine is 48.6 years. Residents are 50.7% female and 49.3% male.
The median home value in Washington County is $147,100 and median monthly rent is $768. 78.1% of occupied housing units are owner-occupied. The county has 21,703 total housing units, 35.5% of which are vacant.
The largest employment sector in Washington County, Maine is professional, scientific, and management services, employing 29.9% of workers. The unemployment rate is 3.5%.
Portland is among the largest cities associated with Washington County, Maine, with a population of 68,505.
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Statewide data for Maine
Population, race, income, age, and trends across Maine
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.