St. Mark's High School is a Roman Catholic co-education for St. Mark's High School secondary school situated just outside Warrenpoint, County Down, Northern Ireland.

It first opened its doors in 1971 when 120 pupils attended.

Academics The school provides instruction in a range of academic subjects. In 2018, 52% of its entrants achieved five or more GCSEs at grades A* to C, including the core subjects English and Maths. Also in 2018, 60% of its entrants to the A-level exam achieved A*-C grades.

Sport The school won the U-16 Ulster title in 2014 and the U-18 title in 2015 in Gaelic football.

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