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Most King County offices will be closed on Monday, February 20, 2017, for President's Day.  
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Putting geographic information to work for King County and beyond.

View, download, or access via application-programmer interface (API) a wealth of King County resources.

Build custom transit maps using datasets from King County Metro Transit.

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

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

Information on progress towards significant King County initiatives.

Detailed property information from the King County Assessor's Office.