Douglas MacArthur High School (commonly MacArthur or Mac) is a public secondary school on the northeast side of San Antonio, Texas, United States. The school, a part of the North East Independent School District serves students in ninth grade through twelfth grade, with admission based primarily on the locations of students' homes. The school serves portions of San Antonio and the portion of Terrell Hills within NEISD. For the 2024–25 school year, the school was given a "C" by the Texas Education Agency.