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Demographics
Explore demographic reports and analysis of King County and unincorporated areas. See data on employment, income, and housing.
2020 statistics
King County
Our county is the 12th most populous county in the United States. King County has a total land area of 2,130 square miles (1,363,200 acres). About 90% of King County's population lives in cities, while about 246,000 residents live in the unincorporated area.
Demographics
- Population
- 1990 census: 1,507,306
- 2000 census: 1,737,046
- 2010 census: 1,931,249
- 2020 census: 2,269,675
- Population growth
- 1990-2000: 15%
- 2000-2010: 11%
- 2010-2020: 18%
- Households, 2020 Census: 917,800
- Average Household Size, 2020 Census: 2.42
- Housing Growth Target for 2019-2044: 308,700
| 2018 ACS Age Structure |
||
|---|---|---|
| 17 and under | 449,200 | 20% |
| 18 - 64 | 1,482,600 | 67% |
| 65 and over | 293,200 | 13% |
| 2020 Census Race and Ethnicity | ||
|---|---|---|
| Non-Hispanic White | 1,230,600 | 54% |
| Black and African American: | 147,800 | 7% |
| Asian | 449,700 | 20% |
| Native Hawaiian and Pacific Islander | 19,400 | 1% |
| Native American and races not listed | 25,300 | 1% |
| Hispanic and Latinx* | 243,000 | 11% |
| Multiracial | 153,800 | 7% |
* Persons of Hispanic/Latinx ethnicity can be of any race.
Employment and income
- 2021 workplaces 66,000
- Median household income
- 1999 (2000 Census): $65,290
- 2020 (ACS): $99,200
- 2020 total jobs: 1,430,900
- Construction/Resources: 77,700
- Wholesale, Transportation, Utilities: 115,400
- Manufacturing: 101,000
- Retail: 163,500
- Financial Institutions and Real Estate: 69,600
- Services: 727,300
- Government: 96,300
- Education: 80,200
| Households by Income Category, 2018: | ||
|---|---|---|
| 0 - 50% | 188,000 | 22% |
| 50 - 80%; | 88,900 | 10% |
| 80 - 100% | 75,100 | 9% |
| 100% + | 495,300 | 58% |
| Total Households | 847,400 | 100% |
Housing
- 2020 housing unit estimate: 969,234
- Single family (including mobile homes): 55%
- Multifamily: 55%
- 2000 Census Median House Value: $240,000;
- 2020 ACS Survey Median House Value: $601,100
- 2000 Census Median 2-Bedroom Rental: $790
- 2020 ACS Median 2-Bedroom Rental: $1,770
- 2020-21 Total New Residential Units: 15,220
- Single family (including mobile homes): 2,200
- Multifamily: 13,030
Sources
- 2010 and 2000 US Census of Population and Housing; US Census Bureau American Community Survey, 2016-20
- US Dept. of Housing and Urban Development, CHAS data 2014-18
- WA Office of Financial Management April 1st Population & Housing Estimates, 2021
- Puget Sound Regional Council tally of jobs covered by state unemployment insurance, from Washington State Employment Security Department
Unincorporated King County
Our unincorporated county has a total land area of 1,713 square miles (1,096,200 acres). About half of unincorporated King County's 246,000 people live in urban areas of western King County.
Demographics
- Population
- 1990 census: 513,298
- 2000 census: 349,234
- 2010 census: 325,002
- 2020 census: 246,300
- Population growth
- 1990-2000: -32%
- 2000-2010: -7%
- 2010-2020: -24%
- Households, 2020 Census: 88,200
- Average Household Size, 2020 Census: 2.78
- Housing Growth Target for 2019-2044: 5,400
| 2018 ACS Age Structure |
||
|---|---|---|
| 17 and under | 74,700 | 24% |
| 18 - 64 | 193,500 | 63% |
| 65 and over | 40,300 | 13% |
| 2020 Census Race and Ethnicity | ||
|---|---|---|
| Non-Hispanic White | 157,400 | 64% |
| Black and African American: | 12,600 | 5% |
| Asian | 31,500 | 13% |
| Native Hawaiian and Pacific Islander | 1,400 | 1% |
| Native American and races not listed | 3,800 | 2% |
| Hispanic and Latinx* | 22,900 | 9% |
| Multiracial | 16,700 | 7% |
* Persons of Hispanic/Latinx ethnicity can be of any race.
Employment and income
- 2021 workplaces 4,100
- Median household income
- 1999 (2000 Census): $65,290
- 2020 (ACS): $105,000
- 2020 total jobs: 40,000
- Construction/Resources: 6,600
- Wholesale, Transportation, Utilities: 2,600
- Manufacturing: 2,100
- Retail: 2,400
- Financial Institutions and Real Estate: 800
- Services: 15,400
- Government: 4,000
- Education: 6,100
| Households by Income Category, 2018: | ||
|---|---|---|
| 0 - 50% | 13,500 | 19% |
| 50 - 80%; | 7,600 | 11% |
| 80 - 100% | 6,400 | 9% |
| 100% + | 43,700 | 61% |
| Total Households | 71,200 | |
Housing
- 2020 housing unit estimate: 92,934
- Single family (including mobile homes): 91%
- Multifamily: 9%
- 2000 Census Median House Value: $240,000;
- 2020 ACS Survey Median House Value: $508,350
- 2000 Census Median 2-Bedroom Rental: $790
- 2020 ACS Median 2-Bedroom Rental: $1,650
- 2020-21 Total New Residential Units: 530
- Single family (including mobile homes): 340
- Multifamily: 190
Sources
- 2010 and 2000 US Census of Population and Housing; US Census Bureau American Community Survey, 2016-20
- US Dept. of Housing and Urban Development, CHAS data 2014-18
- WA Office of Financial Management April 1st Population & Housing Estimates, 2021
- Puget Sound Regional Council tally of jobs covered by state unemployment insurance, from Washington State Employment Security Department