
Cousins Island
- County:
- Cumberland County
- County Seat:
- No
- Area (mi²):
- 1.061
- State:
- Maine
Cousins Island is a CDP located in Cumberland County, Maine. Cousins Island has a 2025 population of 508. Cousins Island is currently growing at a rate of 0.4% annually but its population has decreased by -2.5% since the most recent census, which recorded a population of 521 in 2020.
The average household income in Cousins Island is $197,458 with a poverty rate of 0%. The median age in Cousins Island is 59.9 years: 62.1 years for males, and 59.5 years for females.