
Blairstown
- County:
- Warren County
- County Seat:
- No
- Area (mi²):
- 0.419
- State:
- New Jersey
Blairstown is a CDP located in Warren County, New Jersey. Blairstown has a 2025 population of 205. Blairstown is currently declining at a rate of -9.29% annually and its population has decreased by -23.51% since the most recent census, which recorded a population of 268 in 2020.
The average household income in Blairstown is $102,848 with a poverty rate of 25.97%. The median age in Blairstown is 51.2 years: 51.9 years for males, and 43.6 years for females.