Holy Trinity Catholic High School or Holy Trinity Catholic Secondary School may refer to:
Canada Holy Trinity Catholic High School (Edmonton) in Edmonton, Alberta Holy Trinity Catholic High School (Fort McMurray) in Fort McMurray, Alberta Holy Trinity Catholic High School (Kanata) in Kanata, Ontario Holy Trinity Catholic High School (Simcoe) in Simcoe, Ontario Holy Trinity Catholic Secondary School (Cornwall, Ontario) in Cornwall, Ontario Holy Trinity Catholic Secondary School (Oakville), in Oakville, Ontario Holy Trinity Catholic Secondary School (Courtice), in Courtice, Ontario
United States Holy Trinity Catholic High School (Texas) in Temple, Texas Holy Trinity Catholic Schools, Fort Madison, Iowa - Includes Holy Trinity Catholic Junior/Senior High School
See also Holy Trinity School (disambiguation)