Iona Preparatory School, or simply Iona Prep, is an independent, Roman Catholic, all-male, college-preparatory school located in the north end of New Rochelle, New York, in suburban Westchester County. It consists of the Upper School for Grades 9 through 12 and the Lower School (formerly Iona Grammar School) for Grades kindergarten through eighth grade. The primary and secondary schools are located on separate and nearby campuses less than a mile apart on Stratton Road. It is a privately-owned independent school without parochial affiliation and is located within the Roman Catholic Archdiocese of New York. The school was amed for the Scottish island of Iona, the school was founded in 1916 by the Congregation of Christian Brothers.