Sacred Heart Catholic High School (Newmarket)
 Sacred Heart Catholic High School is a public Catholic high school in Newmarket Ontario Canada. It is currently the only high school in Newmarket under the jurisdiction of the York Catholic District School Board. Sacred Heart has a modest student population compared to other York Region Catholic high schools.[citation needed] There were 1620 full-time registered students for the 2005/2006 year 95 full-time staff members and 24 support staff.