Mater Dei High School (New Jersey)
 Mater Dei Prep: A Catholic Preparatory School is a four-year Catholic coeducational high school located in the New Monmouth section of Middletown Township in Monmouth County New Jersey United States. The school announced that the name would be changed from Mater Dei High School to Mater Dei Prep as of Jul 1 2010 although it is still referred to as Mater Dei High School or MDHS.Mater Dei is part of St. Mary Parish and operates under the supervision of the Roman Catholic Diocese of Trenton.