The Peddie School is a college preparatory school in Hightstown, in Mercer County, in the U.S. state of New Jersey. It is a non-denominational, coeducational boarding school located on a 280-acre (110 ha) campus, and serves students in the ninth through twelfth grades, plus a small post-graduate class. The school has been accredited by the Middle States Association of Colleges and Schools Commission on Elementary and Secondary Schools since 1928.