Marianapolis Preparatory School is an independent, co-educational, Catholic, boarding and day school located in Thompson, CT for grades 9-12 and postgraduates.

Aerial image of campus

Marianapolis is a vibrant and energetic community of 400 students from 56 area towns, numerous states around the U.S., and over 20 countries worldwide. Marianapolis boasts a 7:1 student/teacher ratio with an average class size of 12. With various honors classes, 20 AP® courses, and over 100 electives, students are cultivated to think critically while being guided into mature and capable leaders. At Marianapolis, students are involved in activities across disciplines and are constantly challenging themselves to set new goals and break molds.

Learning by doing and applying is a hallmark of a Marianapolis education through project-based learning platforms such as the Centers of Excellence, LEAP Week, and Experiential Learning. The Centers of Excellence allow where students to pursue a specialized diploma in a specific academic track that includes an internship, and culminates in a yearlong capstone independent study project. The three Centers are Business & Entrepreneurship, Civic Engagement & Service, and Innovation.

At Marianapolis, students have 17 competitive athletic options to choose from (such as crew, swimming, field hockey, and basketball) as well as numerous non-competitive options (such as dance, drama, equestrian, and gymnastics). With over 40 clubs and organizations Marianapolis students have the capability to explore and expand their skills and interests. Students are exposed to numerous leadership opportunities focused on supporting the Marianapolis community and more specifically, the student body. Through leadership roles, students are prepared for life beyond Marianapolis.

Marianapolis graduates are confident, conscientious young adults ready to lead. 

Trinity Foundation Board of Directors

Dan Atwood, Chairman, P'01, P'07, P'20
Joseph Adiletta '72
Alyson Aleman '89
Mehdi Anwar
Charlie Baron P'93, P'95
Tom Dodge '73
Ryan Ford P'13, P'16
Michael Herlihy
Jim LaPosta
Keith O'Hara
Mark Russell '67
Robert Werge '84, P'11, P'13, P'21


The mission of Marianapolis Preparatory School is to educate students in the Catholic tradition of academic excellence, with a commitment to an active faith in God and a dedication to building character with content, compassion, and integrity.

Inclusive of all faiths, our community believes that spirituality is a foundation for compassionate, generous individuals. Marianapolis fosters among its students respect for others, appreciation of diversity, and service to all. Values-based education provides relevant, meaningful lessons that impact our students in and out of the classroom. We contemplate global issues with a moral context; we weigh fairness and values alongside traditional academic lessons. Here, young women and men extend themselves spiritually and intellectually throughout their daily lives. At Marianapolis, students grow into mature, self-directed adults with vision and purpose.