Mount Saint Mary Academy is a four-year private high school for girls, located in Watchung, in Somerset County, in the U.S. state of New Jersey.

A college division that had been part of the school when it was established was relocated to Lakewood Township, New Jersey in 1924 and became Georgian Court University.

[10] The campus is situated on a ridge of the Watchung Mountains, overlooking surrounding suburban towns and the skyline of New York City, which is 23 miles (37 km) to the east.

Under the direction of Sister Mary Eloise Claire, the Academy enjoyed national recognition as an "Exemplary Private School" a designation bestowed on it by the US Department of Education.

[20] In the 2013 finals at The College of New Jersey, the team defeated defending champion Mount Saint Dominic Academy 95–75 to win the Non-Public B title.