The House System is unique among independent schools in America and has been an important part of a Lawrentian's life for more than two centuries.
Each House is a small group within the larger School community that fosters pride, responsibility, and respect for the contributions of others. The Houses are divided by levels and gender, and these differ in degrees of freedom and supervision. Whether a boarding or day student, all students are assigned to a House which provides a home base for each student. Each house has its own house council, fostering leadership in the house. The students work closely with the faculty members who are affiliated with each house. Members of the faculty live in each House and serve as Heads of House and Assistant Heads of House. They are assisted by other faculty members, who also coach, advise, and perform evening supervision on a rotating basis. In this model, students enjoy a high level of attention and guidance.

For day students, study rooms are made available in their assigned House, and on occasion a day student may spend the night in his or her House. Day students are also included in all House functions and are encouraged to take breakfast, lunch, and dinner with their Housemates.
The Lower School consists of four houses within two buildings: Dawes (Cromwell/Perry Ross) and Raymond (Davidson/Thomas).

Third and Fourth Form boys and girls have 11 Circle and Crescent Houses: Carter, Cleve, Dickinson, Griswold, Hamill, Kennedy, Kirby, McClellan, Stanley, Stephens, and Woodhull.

Seniors have five Fifth Form Houses: Haskell, Kinnan, McPherson, Reynolds, and Upper. Lawrenceville works to establish a sense of belonging and cooperation in each House. Each has its own dining area in Irwin Dining Center, House colors and House flag. Circle and Crescent Houses compete for athletic (the Foresman and Dresdner Cups), academic (the Chivers Cup), community service (the Adams Cup) and House spirit (House Cup) honors. Additionally, each House has established traditions through the years, ranging from dances to cheers to annual community service events. When students talk about their Lawrenceville experience, they often start with House life. And "What House were you in?" is usually how alums start their conversations when they first meet.

Since Lawrenceville draws students from around the world and every walk of life, each day brings lessons in cooperation, tolerance, and leadership, through which House leaders influence students, subtly and dramatically, by directive and example. Thus, each House develops a distinct character, shaped by the personalities of its leaders.
Through House and Harkness, Lawrenceville challenges a diverse community of promising young people to lead lives of learning, integrity, and high purpose.  Our mission is to inspire the best in each to seek the best for all.