Geographical definitions

Region

Regions and Health Reporting Areas (HRA) were created to examine geographic patterns below the county level. Four regions—South, Seattle, East and North—are defined either by combined postal ZIP codes or by city-based Health Reporting Areas (below). The city-based boundaries are used whenever possible; ZIP code-based boundaries are used when data are only available by ZIP code (examples include hospitalization data or data from some surveys).

Some slight discrepancies occur in what areas are covered between the HRA and ZIP code based Regions (contact us at data.request@kingcounty.gov for a map), with the major differences in the North and Seattle Regions. Two ZIP codes (98177, 98133) span the Seattle—North Region boundary and are included as part of the North Region ZIP-based area. However, the HRA boundary has a clean delineation between Seattle and North Regions. Along the East-South Region boundary, two ZIP codes (98056, 98059) overlap both Regions. 98056 is assigned to South and 98059 is assigned to East.

North Region includes the areas of Bothell, Cottage Lake, Kenmore, Lake Forest Park, Shoreline, and Woodinville. East Region includes Bellevue, Carnation, Duvall, Issaquah, Kirkland, Medina, Mercer Island, Newcastle, North Bend, Redmond, Sammamish, and Skykomish. South region contains Auburn, Burien, Covington, Des Moines, Enumclaw, Federal Way, Kent, Maple Valley, Normandy Park, Renton, Tukwila, SeaTac, White Center/Boulevard Park, and Vashon Island.