Island County's 2026 population is estimated at 85,332, reflecting a -0.38% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Island County is the 16th largest county in Washington. The 2010 population was 78,700 and has grown 8.43% since 2010.
Overall: 44.8 years
Female: 47.6 years
Male: 42.6 years
There are 71,787 adults, (23,259 of whom are seniors) in Island County.
Female: 43,160 (49.7%)
Male: 43,676 (50.3%)
The racial composition of Island County includes 77.66% White, 4.94% 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 | 67,437 | 77.66% |
| Two or more races | 9,802 | 11.29% |
| Asian | 4,291 | 4.94% |
| Other race | 2,100 | 2.42% |
| Black or African American | 1,969 | 2.27% |
| Native American | 874 | 1.01% |
| Native Hawaiian or Pacific Islander | 363 | 0.42% |
Island County 's average per capita income is $55,672. Household income levels show a median of $90,551. The poverty rate stands at 7.7%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $115,286 | - |
| Families | $108,026 | $129,938 |
| Households | $90,551 | $113,035 |
| Non Families | $53,933 | $72,550 |
Average Income
Median Household Income
Poverty Rate