May 1st is the Common Reply Date. Deposit to the college of your choice must be in by May 1st. Notify other colleges of your non-acceptance. The Columbia School for girls, established in 1891, and the Allendale School for boys, established in 1926, merged in 1972 to form our current co-educational school. Students are from urban, suburban and rural areas.
Admission is gained by examination, school record and interview.
Allendale Columbia is accredited by both the Middle States Association of Schools and Colleges and the New York Association of Independent Schools, and is registered with the Board of Regents. The academic year is divided into two semesters. Each semester is divided into two marking periods. Written reports are sent to parents at the end of each of the four marking periods. Examinations are scheduled at the end of each semester.