Demographics of King County, Washington

King County, Washington had 2,344,939 people on July 1, 2025, by the Census Bureau’s estimate: +70,635 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.

King County, in four figures

2,344,939
Population: July 1, 2025, Vintage 2025 estimate.; +3.1%
Change since July 2020: +70,635 people.; 37.4 ±0.2
Median age: ACS 2020–⁠2024.; $124,746 ±$968
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.

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

The July 1 estimate of King 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

King County, Washington's population grew 3.1% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of King 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	2,274,304	100.0	100.0
2021	2,253,549	99.1	100.2
2022	2,265,822	99.6	100.7
2023	2,283,086	100.4	101.6
2024	2,317,959	101.9	102.5
2025	2,344,939	103.1	103.1

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Population of King 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	2,274,304	+4,636	+2,466	+419	+1,344
2021	2,253,549	−20,755	+8,515	+8,661	−36,917
2022	2,265,822	+12,273	+8,098	+22,343	−16,448
2023	2,283,086	+17,264	+6,806	+32,174	−21,634
2024	2,317,959	+34,873	+7,374	+40,186	−12,652
2025	2,344,939	+26,980	+7,424	+28,428	−9,079

Age, 2020–2024

The median age is 37.4 ±0.2: for men 36.8 ±0.1 and for women 38.0 ±0.1. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in King County by age, ACS 2020–2024
Age	People	Share	Washington	United States
Under 5	119,275 ±0	5.2% ±<0.1	5.5% ±<0.1	5.6% ±<0.1
5 to 17	326,319 ±2,731	14.3% ±0.1	15.8% ±0.1	16.3% ±<0.1
18 to 24	183,581 ±2,477	8.0% ±0.1	8.5% ±0.1	9.1% ±<0.1
25 to 44	786,115 ±3,906	34.4% ±0.2	29.5% ±0.1	26.9% ±<0.1
45 to 64	550,982 ±3,126	24.1% ±0.1	24.0% ±0.1	24.8% ±<0.1
65 and over	320,899 ±3,425	14.0% ±0.1	16.6% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $124,746 ±$968, and income per person $74,100 ±$589, 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 King County by income, ACS 2020–2024
Household income	Households	Share	Washington	United States
Under $25,000	89,094 ±2,724	9.5% ±0.3	11.1% ±0.2	14.6% ±<0.1
$25,000 to $49,999	93,417 ±2,740	9.9% ±0.3	13.2% ±0.2	16.7% ±<0.1
$50,000 to $74,999	104,316 ±2,709	11.1% ±0.3	14.1% ±0.2	15.5% ±<0.1
$75,000 to $99,999	97,720 ±2,777	10.4% ±0.3	12.4% ±0.1	12.6% ±<0.1
$100,000 to $149,999	161,737 ±3,296	17.2% ±0.3	19.2% ±0.2	17.5% ±<0.1
$150,000 to $199,999	114,456 ±2,850	12.2% ±0.3	11.4% ±0.1	9.6% ±<0.1
$200,000 or more	280,314 ±3,290	29.8% ±0.3	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 King County by age, ACS 2020–2024
Age	Below poverty	Rate	Washington	United States
All ages	193,848 ±5,534	8.6% ±0.2	9.9% ±0.2	12.5% ±0.1
Under 18	42,764 ±2,447	9.7% ±0.5	11.6% ±0.3	16.1% ±0.1
18 to 59	109,953 ±3,661	8.0% ±0.3	9.5% ±0.2	11.6% ±0.1
60 and over	41,131 ±1,960	9.3% ±0.4	9.3% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in King County, ACS 2020–2024
Measure	King County	Washington	United States
Housing units	1,003,284 ±329	3,306,620 ±517	143,775,355 ±10,234
Occupied	93.8% ±0.3	92.7% ±0.2	89.9% ±0.1
Vacant	6.2% ±0.3	7.3% ±0.2	10.1% ±0.1
Owner occupied	55.4% ±0.4	63.8% ±0.3	65.2% ±0.3
Renter occupied	44.6% ±0.4	36.2% ±0.2	34.8% ±0.1
Median home value	$859,900 ±$4,853	$564,600 ±$1,940	$332,700 ±$236
Median gross rent	$2,092 ±$13	$1,760 ±$7	$1,413 ±$2
Median year built	1983 ±1	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 King County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Washington	United States
Hispanic or Latino	251,983 ±0	11.0% ±<0.1	14.4% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	1,210,898 ±2,414	52.9% ±0.1	63.1% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	147,480 ±2,416	6.4% ±0.1	3.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	469,780 ±3,271	20.5% ±0.1	9.7% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	8,436 ±696	0.4% ±<0.1	0.8% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	16,925 ±691	0.7% ±<0.1	0.7% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	14,623 ±1,573	0.6% ±0.1	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	167,046 ±4,515	7.3% ±0.2	6.8% ±0.1	4.3% ±<0.1

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 King County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Washington	United States
Born in the state	889,330 ±6,697	38.9% ±0.3	46.4% ±0.2	57.3% ±<0.1
Born in another state	764,396 ±6,074	33.4% ±0.3	36.2% ±0.2	26.9% ±<0.1
Born a citizen outside the states	44,067 ±2,214	1.9% ±0.1	1.9% ±<0.1	1.7% ±<0.1
Born abroad	589,378 ±6,577	25.8% ±0.3	15.4% ±0.1	14.1% ±<0.1
Naturalized citizens	281,460 ±4,432	12.3% ±0.2	7.5% ±0.1	7.4% ±<0.1
Not citizens	307,918 ±6,397	13.5% ±0.3	7.9% ±0.1	6.8% ±<0.1

King County among the counties of Washington

1st of 39 by population, July 2025. Every one is listed on the Washington page.

Counties of Washington near King County in population, July 2025
County	July 2025	Change since 2020
King County	2,344,939	+3.1%
Pierce County	946,288	+2.5%
Snohomish County	870,656	+4.9%
Spokane County	558,344	+3.2%
Clark County	532,119	+5.3%
Thurston County	304,261	+2.8%

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