The Newman School was founded as Newman Preparatory School in 1945, the centennial of John Henry Cardinal Newman's conversion to Roman Catholicism, by Dr. J. Harry Lynch and a group of Catholic laymen, for the purpose of providing college preparation to veterans returning from service to their country in World War II.

Over the years, Newman Prep evolved into a co-educational, diploma-granting program, and eventually began to accept younger students into the ninth grade.

International students come from Australia, Brazil, China, Croatia, Czech Republic, Germany, Greece, Hong Kong, Iran, Italy, Japan, Kazakhstan, Mexico, Russia, South Korea, Spain,.

In addition to a traditional curriculum, The Newman School offers an International Baccalaureate Diploma Programme[1] that students may take advantage of in their junior and senior years.

Their team has traditionally had rivalries with Commonwealth School and Boston University Academy due to its proximity to both, despite being much lower ranked than them.