Established in 1895, the school serves students in pre-kindergarten through twelfth grade.

[2] As of the 2021–22 school year, the school had an enrollment of 38 students (plus 59 in PreK) and 8.1 classroom teachers (on an FTE basis), for a student–teacher ratio of 4.7:1.

The school's student body was 68.4% (3) Hispanic, 15.8% (6) White, 7.9% (3) Asian, 5.3% (2) Black and 2.6% (1) two or more races.

[1] The school aims to provide "a safe, individual oriented environment that stresses basic skills, positive attitudes, values and academic growth."

Collegiate is a member of the New Jersey Association of Independent Schools.