The Waratah Shield is a rugby union knock-out competition for high school teams from New South Wales, Australia. First contested in 1963, it is organised by New South Wales Rugby Union in conjunction with NSW Schools' Rugby Union and NSW Combined High Schools and attracts around 100 entries each year. St Edmund's College, Canberra is the most successful school with fourteen victories. The competition was open to all high schools in NSW, until 2004, the ACT was released due to their dominance.