Seton Hall Preparatory School, generally called Seton Hall Prep, SHP, or "The Prep", is a Roman Catholic all boys' high school located in the suburban community of West Orange in Essex County, in the U.S. state of New Jersey, operating under the supervision of the Archdiocese of Newark. Founded in 1856 with an original enrollment of five boys, Seton Hall Prep was originally located on the campus of Seton Hall University, where it became commonly known as "The Prep" as a way to distinguish it from "The University." In 1985, the school moved to its present location which was, at the time, West Orange High School. Seton Hall is the oldest Catholic college preparatory school in New Jersey.

West Orange is a suburban township in Essex County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 48,843, an increase of 2,636 (+5.7%) from the 2010 census count of 46,207, which in turn reflected an increase of 1,264 (+2.8%) from the 44,943 counted in the 2000 census.