Franklin County's 2026 population is estimated at 103,838, reflecting a 1.19% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Franklin County is the 14th largest county in Washington. The 2010 population was 79,076 and has grown 31.31% since 2010.
Overall: 30.9 years
Female: 30.7 years
Male: 31 years
There are 68,337 adults, (10,257 of whom are seniors) in Franklin County.
Female: 47,939 (48.5%)
Male: 50,963 (51.5%)
The racial composition of Franklin County includes 45.45% White, 20.84% other race, and smaller percentages for Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 44,953 | 45.45% |
| Two or more races | 28,101 | 28.41% |
| Other race | 20,608 | 20.84% |
| Black or African American | 1,909 | 1.93% |
| Asian | 1,825 | 1.85% |
| Native American | 1,342 | 1.36% |
| Native Hawaiian or Pacific Islander | 164 | 0.17% |
Franklin County 's average per capita income is $50,133. Household income levels show a median of $86,714. The poverty rate stands at 13.13%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $108,585 | $133,976 |
| Families | $92,037 | $115,012 |
| Households | $86,714 | $109,166 |
| Non Families | $52,474 | $67,806 |
Average Income
Median Household Income
Poverty Rate