Voter file loaded June 9, 2026 · figures are from that file, held as a fixed record
Whitman County, Washington has 24,441 active registered voters across 81 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 Whitman County voted for president
Election results are public records.
Whitman County at a glance.
Whitman County had an estimated 48,399 residents in July 2024, the 23rd most populous of Washington's 39 counties, up 0.9% since the 2020 census. Of those, 40,828 are 18 or older, the voting-age population, and 12.2% are 65 or older. Its 24,441 active registered voters equal about 59.9% of that voting-age population.
It covers 2,159 square miles of land (22 people per square mile), and 12.1% of residents live outside any incorporated city or town. The largest cities and towns are Pullman (33,543), Colfax (2,692), Palouse (1,029), Tekoa (809) and St. John (590). The American Community Survey (2020-2024) puts it at a median age of 26.4, a median household income of $55,406, 49.8% of adults 25 and older holding a bachelor's degree or higher and 46.8% of occupied homes owned by the people living in them.
In 2024, 19,845 votes were cast for president, about 48.6% of the voting-age population; the Democratic ticket took 52.8% and the Republican ticket 43.8%. The two-party margin moved from D+5.5 in 2008 to D+9.0 in 2024.
- Population (2024 estimate)
- 48,399
- Population (2020 census base)
- 47,979
- Voting-age population (18+)
- 40,828
- Active voters per 100 adults
- 59.9
- Residents 65 and older
- 12.2%
- People per square mile
- 22
- Living outside incorporated places
- 12.1%
- Land area
- 2,159 sq mi
- Median age
- 26.4
- Median household income
- $55,406
- Adults 25+ with a bachelor's degree
- 49.8%
- Owner-occupied homes
- 46.8%
Largest cities and towns
- Pullman 33,543
- Colfax 2,692
- Palouse 1,029
- Tekoa 809
- St. John 590
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 52.8% | 43.8% | D+9.0 | 19,845 |
| 2020 | 52.9% | 42.9% | D+10.0 | 21,126 |
| 2016 | 45.5% | 45.0% | D+0.5 | 12,128 |
| 2012 | 46.5% | 50.2% | R+3.7 | 14,851 |
| 2008 | 51.6% | 46.1% | D+5.5 | 17,589 |
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.
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