Grant County's 2026 population is estimated at 107,975, reflecting a 1.53% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Grant County is the 13th largest county in Washington. The 2010 population was 89,554 and has grown 20.57% since 2010.
Data after 2023 is projected based on recent change
Overall: 33.7 years
Female: 34.1 years
Male: 33.3 years
There are 73,001 adults, (14,822 of whom are seniors) in Grant County.
Female: 49,694 (48.8%)
Male: 52,105 (51.2%)
The racial composition of Grant County includes 55.82% White, 22.39% other race, and smaller percentages for Native American, Black or African American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 56,828 | 55.82% |
| Other race | 22,793 | 22.39% |
| Two or more races | 18,149 | 17.83% |
| Native American | 1,589 | 1.56% |
| Black or African American | 1,345 | 1.32% |
| Asian | 1,066 | 1.05% |
| Native Hawaiian or Pacific Islander | 29 | 0.03% |
Grant County 's average per capita income is $46,489. Household income levels show a median of $73,267. The poverty rate stands at 15.85%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $94,543 | $118,214 |
| Families | $80,876 | $102,366 |
| Households | $73,267 | $92,003 |
| Non Families | $42,572 | $56,538 |
Average Income
Median Household Income
Poverty Rate