St Ninian's High School is a six-year co-educational Roman Catholic state high school in Giffnock, East Renfrewshire, Scotland. The school, which opened in 1984, serves Giffnock, Clarkston, Thornliebank, Newton Mearns, Eaglesham, Netherlee, Waterfoot, Netherplace, Millhall and Busby in East Renfrewshire. The school roll was 1,714 as of September 2005, and the Head Teacher is Gerry O’Neil. The school's motto is "Floreat Iuventus" which translates as "Let youth Flourish".
