
Foster Brook
- County:
- McKean County
- County Seat:
- No
- Area (mi²):
- 3.152
- State:
- Pennsylvania
Foster Brook is a CDP located in McKean County, Pennsylvania. Foster Brook has a 2025 population of 1,023. Foster Brook is currently declining at a rate of -1.54% annually and its population has decreased by -8.25% since the most recent census, which recorded a population of 1,115 in 2020.
The average household income in Foster Brook is $107,683 with a poverty rate of 9.57%. The median age in Foster Brook is 49.6 years: 48.4 years for males, and 51.1 years for females.