Bishop James Mahoney High School (BJM) is a high school serving grades 9 to 12, located in the Lawson Heights neighbourhood in the north end of Saskatoon, Saskatchewan, Canada.

It is operated by Greater Saskatoon Catholic Schools.

Bishop James Mahoney High School opened for classes on September 4, 1984.

Prior to his appointment as Bishop, Mahoney was a classroom teacher at the former St. Paul's High School and E. D. Feehan Catholic High School.

He also served as the first principal of Holy Cross High School.