
Anderson Island
- County:
- Pierce County
- County Seat:
- No
- Area (mi²):
- 7.952
- State:
- Washington
Anderson Island is a CDP located in Pierce County, Washington. Anderson Island has a 2025 population of 1,767. Anderson Island is currently growing at a rate of 2.85% annually and its population has increased by 12.48% since the most recent census, which recorded a population of 1,571 in 2020.
The average household income in Anderson Island is $150,214 with a poverty rate of 26.77%. The median age in Anderson Island is 61.3 years: 61.7 years for males, and 57.9 years for females.