History
Peck School originally started in 1893 on Franklin Street, founded as Miss Sutphen's School for Young Ladies, with six initial students. Lorraine T. Peck purchased the school late in 1917. In 1920, the school moved to Elm Street, and then into its current location on South Street, in the Lindenwold Mansion and the surrounding acres.

In 1993, Peck School completed the Deetjen Kindergarten Building. In 1995, the Caspersen-Tomlinson Academic Building was completed, followed by the F. M. Kirby Lower School in 1998. In 2006 the 35,000 square feet Eckhert Huff Building was completed, which was followed by the Athletic Center in 2007.

Notable headmasters include Mr. Lorraine T. Peck (1917–1944), Mr. Philip S. Hesseltine (1946–1954), and Mr. Rudy Deetjen (1977–1994). The current headmaster is John J. Kowalik (July 2003).

John Kowalik is the current Headmaster, Matt Sigrist is the upper school director, Nina Sharma is the lower school director, Erin Ceder is the director of admissions and financial aid, Victor Taylor is the director of curriculum and faculty development, replacing Dr. Vincent Janney, and Don Diebold is the director of sports and physical education.