Demographics of Washington County, Maine

Washington County, Maine had 31,334 people on July 1, 2025, by the Census Bureau’s estimate: +243 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Washington County, in four figures

31,334
Population: July 1, 2025, Vintage 2025 estimate.; +0.8%
Change since July 2020: +243 people.; 48.6 ±0.3
Median age: ACS 2020–⁠2024.; $56,024 ±$2,346
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Washington County, Maine's population grew 0.8% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Washington County, Maine's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Washington County, Maine's population grew 0.8% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Washington County, Maine's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	31,091	100.0	100.0
2021	31,200	100.4	100.2
2022	31,482	101.3	100.7
2023	31,471	101.2	101.6
2024	31,466	101.2	102.5
2025	31,334	100.8	103.1

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Population of Washington County, Maine on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	31,091	+1	−71	0	+72
2021	31,200	+109	−244	+11	+344
2022	31,482	+282	−325	+18	+561
2023	31,471	−11	−307	+49	+250
2024	31,466	−5	−250	+30	+221
2025	31,334	−132	−249	+26	+91

Age, 2020–2024

The median age is 48.6 ±0.3: for men 47.7 ±0.4 and for women 49.8 ±0.3. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Washington County by age, ACS 2020–2024
Age	People	Share	Maine	United States
Under 5	1,449 ±71	4.6% ±0.2	4.5% ±<0.1	5.6% ±<0.1
5 to 17	4,360 ±174	13.9% ±0.6	13.6% ±0.2	16.3% ±<0.1
18 to 24	2,228 ±181	7.1% ±0.6	8.0% ±0.1	9.1% ±<0.1
25 to 44	6,414 ±214	20.5% ±0.7	24.2% ±0.2	26.9% ±<0.1
45 to 64	8,627 ±247	27.5% ±0.8	27.4% ±0.2	24.8% ±<0.1
65 and over	8,253 ±311	26.3% ±1.0	22.4% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $56,024 ±$2,346, and income per person $33,745 ±$1,102, in 2024 dollars. The median is $74,733 ±$795 in Maine and $80,734 ±$166 in the United States.

Households by income

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Households in Washington County by income, ACS 2020–2024
Household income	Households	Share	Maine	United States
Under $25,000	3,270 ±252	23.0% ±1.7	15.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	3,078 ±236	21.7% ±1.6	18.4% ±0.4	16.7% ±<0.1
$50,000 to $74,999	2,554 ±209	18.0% ±1.4	16.8% ±0.4	15.5% ±<0.1
$75,000 to $99,999	1,823 ±193	12.8% ±1.3	13.0% ±0.4	12.6% ±<0.1
$100,000 to $149,999	2,031 ±191	14.3% ±1.3	18.4% ±0.4	17.5% ±<0.1
$150,000 to $199,999	791 ±132	5.6% ±0.9	9.1% ±0.3	9.6% ±<0.1
$200,000 or more	640 ±127	4.5% ±0.9	9.4% ±0.3	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Washington County by age, ACS 2020–2024
Age	Below poverty	Rate	Maine	United States
All ages	5,188 ±426	17.1% ±1.4	10.7% ±0.3	12.5% ±0.1
Under 18	1,064 ±150	18.9% ±2.5	13.1% ±0.7	16.1% ±0.1
18 to 59	2,464 ±259	17.6% ±1.8	10.5% ±0.3	11.6% ±0.1
60 and over	1,660 ±164	15.5% ±1.5	9.7% ±0.4	11.0% ±<0.1

Housing, 2020–2024

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Housing in Washington County, ACS 2020–2024
Measure	Washington County	Maine	United States
Housing units	21,726 ±56	751,876 ±671	143,775,355 ±10,234
Occupied	65.3% ±1.2	79.4% ±0.3	89.9% ±0.1
Vacant	34.7% ±1.2	20.6% ±0.3	10.1% ±0.1
Owner occupied	79.7% ±1.3	74.3% ±0.5	65.2% ±0.3
Renter occupied	20.3% ±1.7	25.7% ±0.4	34.8% ±0.1
Median home value	$161,800 ±$5,439	$296,600 ±$2,876	$332,700 ±$236
Median gross rent	$783 ±$91	$1,139 ±$13	$1,413 ±$2
Median year built	1975 ±2	1977 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Washington County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Maine	United States
Hispanic or Latino	796 ±0	2.5% ±<0.1	2.2% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	27,440 ±159	87.6% ±0.5	89.9% ±0.2	57.4% ±<0.1
Black alone, not Hispanic	234 ±71	0.7% ±0.2	1.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	104 ±28	0.3% ±0.1	1.1% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	1,391 ±91	4.4% ±0.3	0.3% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	8 to 34	< 0.1% to 0.1%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	65 ±31	0.2% ±0.1	0.4% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	1,280 ±186	4.1% ±0.6	4.2% ±0.2	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Washington County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Maine	United States
Born in the state	19,642 ±451	62.7% ±1.4	59.6% ±0.4	57.3% ±<0.1
Born in another state	10,041 ±431	32.0% ±1.4	35.2% ±0.3	26.9% ±<0.1
Born a citizen outside the states	496 ±106	1.6% ±0.3	1.1% ±0.1	1.7% ±<0.1
Born abroad	1,152 ±169	3.7% ±0.5	4.1% ±0.1	14.1% ±<0.1
Naturalized citizens	744 ±135	2.4% ±0.4	2.1% ±0.1	7.4% ±<0.1
Not citizens	408 ±105	1.3% ±0.3	1.9% ±0.1	6.8% ±<0.1

Washington County among the counties of Maine

14th of 16 by population, July 2025. Every one is listed on the Maine page.

Counties of Maine near Washington County in population, July 2025
County	July 2025	Change since 2020
Somerset County	51,620	+2.3%
Knox County	41,117	+1.1%
Waldo County	40,693	+2.6%
Sagadahoc County	37,979	+3.4%
Lincoln County	36,595	+3.8%
Washington County	31,334	+0.8%
Franklin County	30,824	+4.6%
Piscataquis County	17,409	+3.5%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026