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Jefferson County, Washington

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28,782
Active registered voters
37
Precincts
5
Presidential cycles of results

Voter file loaded June 5, 2026 · figures are from that file, held as a fixed record

Jefferson County, Washington has 28,782 active registered voters across 37 precincts, as of July 2026.

Party registration

Washington doesn't register voters by party, so there's no party breakdown to show. Party lean is usually inferred from primary participation; that data is in the voter file and available inside Motion51.

How Jefferson County voted for president

66.3
31.7
2008
64.0
32.7
2012
62.5
29.8
2016
69.4
28.0
2020
71.1
25.7
2024
■ Democratic %   ■ Republican %  ·  2024 total votes cast: 24,572

Election results are public records.

Source:  Official county canvasses via MIT Election Data + Science Lab

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Also see: Motion51 in Washington · How to run for office in Jefferson County · Pricing