Demographics of Adams County, Washington

Adams County, Washington had 21,488 people on July 1, 2025, by the Census Bureau’s estimate: +878 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.

Adams County, in four figures

21,488
Population: July 1, 2025, Vintage 2025 estimate.; +4.3%
Change since July 2020: +878 people.; 29.3 ±0.2
Median age: ACS 2020–⁠2024.; $66,136 ±$4,393
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.

Adams County, Washington's population grew 4.3% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Adams County, Washington'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

Adams County, Washington's population grew 4.3% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Adams County, Washington'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	20,610	100.0	100.0
2021	20,644	100.2	100.2
2022	20,849	101.2	100.7
2023	20,903	101.4	101.6
2024	21,322	103.5	102.5
2025	21,488	104.3	103.1

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Population of Adams County, Washington on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	20,610	0	+56	+3	−59
2021	20,644	+34	+220	+48	−228
2022	20,849	+205	+168	+49	+2
2023	20,903	+54	+201	+140	−289
2024	21,322	+419	+265	+283	−130
2025	21,488	+166	+271	+83	−190

Age, 2020–2024

The median age is 29.3 ±0.2: for men 28.9 ±0.8 and for women 29.7 ±0.3. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Adams County by age, ACS 2020–2024
Age	People	Share	Washington	United States
Under 5	1,787 ±25	8.6% ±0.1	5.5% ±<0.1	5.6% ±<0.1
5 to 17	5,436 ±329	26.1% ±1.6	15.8% ±0.1	16.3% ±<0.1
18 to 24	2,208 ±267	10.6% ±1.3	8.5% ±0.1	9.1% ±<0.1
25 to 44	4,874 ±272	23.4% ±1.3	29.5% ±0.1	26.9% ±<0.1
45 to 64	3,966 ±223	19.1% ±1.1	24.0% ±0.1	24.8% ±<0.1
65 and over	2,529 ±252	12.2% ±1.2	16.6% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $66,136 ±$4,393, and income per person $28,514 ±$2,582, in 2024 dollars. The median is $98,141 ±$414 in Washington and $80,734 ±$166 in the United States.

Households by income

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Households in Adams County by income, ACS 2020–2024
Household income	Households	Share	Washington	United States
Under $25,000	1,027 ±220	16.3% ±3.5	11.1% ±0.2	14.6% ±<0.1
$25,000 to $49,999	1,321 ±291	21.0% ±4.6	13.2% ±0.2	16.7% ±<0.1
$50,000 to $74,999	1,168 ±229	18.6% ±3.6	14.1% ±0.2	15.5% ±<0.1
$75,000 to $99,999	986 ±192	15.7% ±3.0	12.4% ±0.1	12.6% ±<0.1
$100,000 to $149,999	762 ±172	12.1% ±2.7	19.2% ±0.2	17.5% ±<0.1
$150,000 to $199,999	553 ±149	8.8% ±2.4	11.4% ±0.1	9.6% ±<0.1
$200,000 or more	471 ±136	7.5% ±2.2	18.5% ±0.2	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 Adams County by age, ACS 2020–2024
Age	Below poverty	Rate	Washington	United States
All ages	4,033 ±868	19.5% ±4.2	9.9% ±0.2	12.5% ±0.1
Under 18	1,876 ±377	26.0% ±4.8	11.6% ±0.3	16.1% ±0.1
18 to 59	1,795 ±450	17.9% ±4.3	9.5% ±0.2	11.6% ±0.1
60 and over	362 ±109	10.8% ±3.2	9.3% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Adams County, ACS 2020–2024
Measure	Adams County	Washington	United States
Housing units	6,926 ±27	3,306,620 ±517	143,775,355 ±10,234
Occupied	90.8% ±2.3	92.7% ±0.2	89.9% ±0.1
Vacant	9.2% ±2.3	7.3% ±0.2	10.1% ±0.1
Owner occupied	69.3% ±3.7	63.8% ±0.3	65.2% ±0.3
Renter occupied	30.7% ±4.2	36.2% ±0.2	34.8% ±0.1
Median home value	$273,300 ±$14,966	$564,600 ±$1,940	$332,700 ±$236
Median gross rent	$877 ±$81	$1,760 ±$7	$1,413 ±$2
Median year built	1977 ±2	1985 ±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 Adams County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Washington	United States
Hispanic or Latino	13,423 ±0	64.5% ±<0.1	14.4% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	6,469 ±155	31.1% ±0.7	63.1% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 98	0% to 0.5%	3.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	43 to 195	0.2% to 0.9%	9.7% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	8 to 86	< 0.1% to 0.4%	0.8% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 67	0% to 0.3%	0.7% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	30 to 246	0.1% to 1.2%	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	535 ±145	2.6% ±0.7	6.8% ±0.1	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 Adams County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Washington	United States
Born in the state	11,374 ±684	54.7% ±3.3	46.4% ±0.2	57.3% ±<0.1
Born in another state	4,190 ±448	20.1% ±2.2	36.2% ±0.2	26.9% ±<0.1
Born a citizen outside the states	33 to 265	0.2% to 1.3%	1.9% ±<0.1	1.7% ±<0.1
Born abroad	5,087 ±506	24.5% ±2.4	15.4% ±0.1	14.1% ±<0.1
Naturalized citizens	989 ±274	4.8% ±1.3	7.5% ±0.1	7.4% ±<0.1
Not citizens	4,098 ±513	19.7% ±2.5	7.9% ±0.1	6.8% ±<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%.

Adams County among the counties of Washington

31st of 39 by population, July 2025. Every one is listed on the Washington page.

Counties of Washington near Adams County in population, July 2025
County	July 2025	Change since 2020
Okanogan County	45,230	+7.3%
Jefferson County	33,970	+2.7%
Pacific County	24,357	+3.6%
Klickitat County	24,331	+6.6%
Asotin County	22,545	+1.0%
Adams County	21,488	+4.3%
San Juan County	18,577	+4.2%
Pend Oreille County	14,457	+7.0%
Skamania County	12,669	+5.2%
Lincoln County	11,982	+9.7%
Ferry County	7,517	+4.4%

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