Blair Academy is a coeducational, boarding and day school for students in high school. The school serves students from ninth through twelfth grades as well as a small post-graduate class. The school's campus is located on a 463 acres (1.87 km2) campus in Blairstown Township in Warren County, New Jersey, approximately 60 miles (97 km) west of New York City.

Blairstown is a township in Warren County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 5,704, a decrease of 263 (−4.4%) from the 2010 census count of 5,967, which in turn reflected an increase of 220 (+3.8%) from the 5,747 counted in the 2000 census.