The Manlius Pebble Hill School (MPH) is a non-sectarian, coeducational, independent, pre-K through 12 school in DeWitt, New York. The school is the result of a merger in 1970 between The Manlius School, founded in 1869; and the Pebble Hill School, established in 1926. MPH marked its 150th anniversary in 2019. MPH is accredited by the New York State Association of Independent Schools, of which it is a founding member; and is a member also of the National Association of Independent Schools.

DeWitt is a town in Onondaga County, New York, United States. As of the 2020 census, the population was 26,074. The town is named after major Moses DeWitt, a judge and soldier. An eastern suburb of Syracuse, DeWitt also is the site of most of the campus and all of the academic buildings of Le Moyne College.