St. Mary High School (Jersey City New Jersey)
 St. Mary High School was a private Roman Catholic high school in Jersey City New Jersey United States that operated as part of the Roman Catholic Archdiocese of Newark until the school was closed in June 2011.As of the 2009-10 school year the school had an enrollment of 203 students and 12.8 classroom teachers (on an FTE basis) for a student–teacher ratio of 15.9.