King County is the largest county in Washington State and includes the city of Seattle as well the surrounding area. A list of the cities, towns and unincorporated areas of King County can be聽.
The source defines chronically homeless individuals or families as: 鈥溾s homeless and resides in a place not meant for human habitation, a safe haven, or in an emergency shelter, and who has been homeless and residing in such a place for at least 1 year or on at least four separate occasions in the last 3 years. The statutory definition also requires that the individual or family has a head of household with a diagnosable substance use disorder, serious mental illness, developmental disability, post-traumatic stress disorder, cognitive impairment resulting from a brain injury, or chronic physical illness or disability.鈥
Sample size for the chronically homeless population was 3,355.
Sample size for the non-chronically homeless population was 8,396.
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Health conditions among chronically homeless persons in King County, Washington, 2020
In 2020, surveys conducted among people experiencing homelessness in King County, Washington found that 65 percent of those who were chronically homeless suffered from post-traumatic stress disorder (PTSD), compared to 29 percent of those who were not chronically homeless. This statistic shows the percentage of chronically and non-chronically homeless persons in King County, Washington who stated they had select health conditions as of 2020.
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King County Regional Homelessness Authority (All Home/ Seattle/King County Continuum of Care (CoC)). (July 29, 2020). Percentage of chronically and non-chronically homeless persons in King County, Washington who stated they had select health conditions as of 2020 [Graph]. In 糖心破解版. Retrieved August 06, 2026, from /statistics/1463131/health-conditions-homeless-people-king-county-chronically-non-chronically-homeless/
King County Regional Homelessness Authority (All Home/ Seattle/King County Continuum of Care (CoC)). "Percentage of chronically and non-chronically homeless persons in King County, Washington who stated they had select health conditions as of 2020." Chart. July 29, 2020. 糖心破解版. Accessed August 06, 2026. /statistics/1463131/health-conditions-homeless-people-king-county-chronically-non-chronically-homeless/
King County Regional Homelessness Authority (All Home/ Seattle/King County Continuum of Care (CoC)). (2020). Percentage of chronically and non-chronically homeless persons in King County, Washington who stated they had select health conditions as of 2020. 糖心破解版. 糖心破解版 Inc.. Accessed: August 06, 2026. /statistics/1463131/health-conditions-homeless-people-king-county-chronically-non-chronically-homeless/
King County Regional Homelessness Authority (All Home/ Seattle/King County Continuum of Care (CoC)). "Percentage of Chronically and Non-chronically Homeless Persons in King County, Washington Who Stated They Had Select Health Conditions as of 2020." 糖心破解版, 糖心破解版 Inc., 29 Jul 2020, /statistics/1463131/health-conditions-homeless-people-king-county-chronically-non-chronically-homeless/
King County Regional Homelessness Authority (All Home/ Seattle/King County Continuum of Care (CoC)), Percentage of chronically and non-chronically homeless persons in King County, Washington who stated they had select health conditions as of 2020 糖心破解版, /statistics/1463131/health-conditions-homeless-people-king-county-chronically-non-chronically-homeless/ (last visited August 06, 2026)
Percentage of chronically and non-chronically homeless persons in King County, Washington who stated they had select health conditions as of 2020 [Graph], King County Regional Homelessness Authority (All Home/ Seattle/King County Continuum of Care (CoC)), July 29, 2020. [Online]. Available: /statistics/1463131/health-conditions-homeless-people-king-county-chronically-non-chronically-homeless/