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Providing regular, updated data on the health of King County's population is a core function of Public Health — Seattle & King County. Data is intended to inform the community, including policy makers, medical personnel, researchers, community-based organizations, government agencies and individuals to understand and respond to diseases, threats and underlying conditions impacting our health.

Data highlights

Trends and Characteristics in Marijuana Use Among Public School Students, 2004–2016
Youth marijuana use can have adverse health outcomes. The data in this report reflects trends of past 30-day marijuana use and perception of harm among King County public school students between 2004 and 2016.

2018 Overdose Death Report
This report describes drug and alcohol-caused deaths investigated by the King County Medical Examiner's Office. Learn more.

2018 Health Care for the Homeless Network Annual Report
Public Health's Health Care for the Homeless Network enters its 23rd year serving King County's most vulnerable residents.

The Assessment, Policy Development and Evaluation Unit's primary work is assessment and evaluation of population-based data and interventions, integrating qualitative analysis, and policy development. We are a multidisciplinary group of epidemiologists, social research scientists, and policy specialists. We collaborate with community and other Public Health — Seattle & King County divisions, using and developing state-of-the-art techniques for data collection and analysis. Our goal is to provide leadership and technical assistance for population-level health assessment, data-driven program planning, program evaluation, and policy.

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