Cathedral High School is a private, Roman Catholic high school in New Ulm, Minnesota, United States.

It is located in the Roman Catholic Diocese of New Ulm.

Cathedral High School is part of New Ulm Area Catholic Schools and traces its roots back to 1872, and opened in 1919 after the local parochial school added a secondary school class.

[7] The school baseball team is known for winning the 1951 Catholic state championship.

The school Robotics program has managed to send teams the world championship three times.