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
Election results are public records.
Jefferson County at a glance.
Jefferson County had an estimated 33,944 residents in July 2024, the 27th most populous of Washington's 39 counties, up 3.0% since the 2020 census. Of those, 30,274 are 18 or older, the voting-age population, and 42.6% are 65 or older. Its 28,782 active registered voters equal about 95.1% of that voting-age population.
It covers 1,804 square miles of land (19 people per square mile), and 68.6% of residents live outside any incorporated city or town. Its one incorporated place is Port Townsend (10,649 residents). The American Community Survey (2020-2024) puts it at a median age of 59.8, a median household income of $74,048, 43.9% of adults 25 and older holding a bachelor's degree or higher and 79.0% of occupied homes owned by the people living in them.
In 2024, 24,572 votes were cast for president, about 81.2% of the voting-age population; the Democratic ticket took 71.1% and the Republican ticket 25.7%. The two-party margin moved from D+34.6 in 2008 to D+45.4 in 2024.
- Population (2024 estimate)
- 33,944
- Population (2020 census base)
- 32,970
- Voting-age population (18+)
- 30,274
- Active voters per 100 adults
- 95.1
- Residents 65 and older
- 42.6%
- People per square mile
- 19
- Living outside incorporated places
- 68.6%
- Land area
- 1,804 sq mi
- Median age
- 59.8
- Median household income
- $74,048
- Adults 25+ with a bachelor's degree
- 43.9%
- Owner-occupied homes
- 79.0%
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 71.1% | 25.7% | D+45.4 | 24,572 |
| 2020 | 69.4% | 28.0% | D+41.4 | 24,792 |
| 2016 | 62.5% | 29.8% | D+32.7 | 20,100 |
| 2012 | 64.0% | 32.7% | D+31.3 | 18,717 |
| 2008 | 66.3% | 31.7% | D+34.6 | 19,991 |
Sources: U.S. Census Bureau Vintage 2024 population estimates and 2024 Gazetteer; American Community Survey 2020–2024 5-year estimates; certified county presidential returns. Growth, density and turnout are simple arithmetic on those figures.
Running in Jefferson County?
The voter file is loaded. Create your campaign and start canvassing in minutes.
Start free in Jefferson CountyAlso see: Motion51 in Washington · How to run for office in Jefferson County · Pricing