
Hat Island
- County:
- Snohomish County
- County Seat:
- No
- Area (mi²):
- 0.688
- State:
- Washington
Hat Island is a CDP located in Snohomish County, Washington. Hat Island has a 2025 population of 26. Hat Island is currently growing at a rate of 8.33% annually but its population has decreased by -57.38% since the most recent census, which recorded a population of 61 in 2020.
The average household income in Hat Island is $0 with a poverty rate of 0%. The median age in Hat Island is 0 years: 0 years for males, and 0 years for females.