Opened in 1980, St. Mark Catholic High School is located in Manotick, a neighbourhood in the city of Ottawa. Its enrollment is currently around 1100 after losing about 600 students to St. Francis Xavier Catholic High School in 2009 & 2010, after the completion of its construction in 2009. St. Francis Xavier is located just down Limebank Road, less than 10 minutes from St. Mark.