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King County agencies provide data to the public through a variety of platforms and formats. While much of the County's data resides on dedicated open data portals, several agencies also publish important data on their own websites, or through partners. Explore the links below to discover King County's most interesting data!


 GIS data

Putting geographic information to work for King County and beyond


View, download, and analyze data from King County's Open Data Portal


Transportation data

Build custom transit maps using datasets from King County Metro Transit


Elections data

Get the latest election results and find ballot return locations across King County


Public safety data

King County Sheriff's Office data includes incident details such as time, place and crime


Performance data

Information on progress towards significant King County initiatives


Property data

Detailed property information from the King County Assessor's Office


Public Health data

A comprehensive overview of demographics, health, and health behaviors among King County residents


Environment Data

Environmental Data from King County's Department of Natural Resources and Parks