About — King County Election Results

These visualizations are unofficial. For official results, visit King County Elections.

What is this?

This site displays King County, Washington election results at the precinct level on an interactive map. Each precinct is colored by its winning candidate, with the color intensity reflecting the margin of victory. A turnout view is also available. You can hover or tap any precinct to see a full breakdown of results for that precinct.

Who made it?

This site was built by Jason Weill using Claude Code, Anthropic's AI coding assistant. More election visualizations are available on Tableau Public.

Data sources

All data is published by King County:

Election results: King County Elections
Precinct shapefiles: King County GIS Open Data

Technology

Leaflet — interactive maps
OpenStreetMap & CARTO — base map tiles
Tom Select — race search dropdown
Vanilla HTML, CSS, and JavaScript — no frameworks or build tools

Color accessibility

Candidate colors are drawn from an Okabe-Ito inspired palette that avoids red/green pairs, making results distinguishable for people with the most common forms of color vision deficiency.