St. Thomas Aquinas High School (New Jersey)

St. Thomas Aquinas High School, formerly known as Bishop George Ahr High School, is a private four-year college preparatory and coeducational Roman Catholic high school for students from ninth through twelfth grades. It is located on a campus covering 34 acres (14 ha) in the northern section of Edison, in Middlesex County, in the U.S. state of New Jersey. The school operates under the auspices of the Roman Catholic Diocese of Metuchen.

The school has an enrollment of 570 students and 45 classroom teachers, for a student–teacher ratio of 12.75:1. Students attend the school from Middlesex, Union, Monmouth, and Somerset counties in Central New Jersey.

The administration and teaching faculty hold B.S. or B.A. degrees; a significant percentage have M.A. degrees; and some hold a Ph.D. degree. St. Thomas Aquinas High School is overseen by the New Jersey Department of Education and is accredited by AdvancED.