Mater Dei High School

Mater Dei High School may refer to:


 * Mater Dei High School (Santa Ana, California), Catholic high school in Orange County, California
 * Mater Dei High School (Breese, Illinois), Catholic high school in Clinton County, Illinois
 * Mater Dei High School (Evansville, Indiana), Catholic high school in Vanderburgh County, Indiana
 * Mater Dei High School (New Jersey), Catholic high school in Middletown Township, New Jersey
 * Mater Dei Catholic High School (Chula Vista, California)
 * Mater Dei Catholic College, Catholic high school in Wagga Wagga, New South Wales, Australia