Whitman County's 2026 population is estimated at 49,161, reflecting a 1.34% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Whitman County is the 24th largest county in Washington. The 2010 population was 44,795 and has grown 9.75% since 2010.
Overall: 26.4 years
Female: 25.9 years
Male: 26.9 years
There are 39,564 adults, (5,597 of whom are seniors) in Whitman County.
Female: 23,281 (49.5%)
Male: 23,722 (50.5%)
The racial composition of Whitman County includes 76.16% White, 6.87% Asian, and smaller percentages for other race, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 35,796 | 76.16% |
| Two or more races | 5,610 | 11.94% |
| Asian | 3,228 | 6.87% |
| Other race | 1,292 | 2.75% |
| Black or African American | 685 | 1.46% |
| Native American | 298 | 0.63% |
| Native Hawaiian or Pacific Islander | 94 | 0.2% |
Whitman County 's average per capita income is $50,799. Household income levels show a median of $55,406. The poverty rate stands at 22.66%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $114,451 | $135,132 |
| Families | $97,805 | $119,087 |
| Households | $55,406 | $84,165 |
| Non Families | $27,835 | $47,251 |
Average Income
Median Household Income
Poverty Rate