Albertus Magnus High School, also known as AMHS, Albertus, and Magnus, is an American Catholic, co-educational high school located in Bardonia, New York, named after the German philosopher and theologian of the same name.

The school is administered by the Dominican Sisters of Sparkill, which was founded on May 6, 1876, in New York City by Mother Catherine Mary Antoninus Thorpe.

At the request of Cardinal Spellman in the early 1950s, the Dominican Sisters of Sparkill founded Albertus Magnus High School.

In July 1957, the property was purchased and thus began the journey of Albertus Magnus, the first Catholic secondary school in Rockland County.

[4] In 2023, the Boys Baseball team reached the New York State Final Four for Class B.