Cardiff High School (Welsh: Ysgol Uwchradd Caerdydd) is a comprehensive school in the Cyncoed area of Cardiff, Wales. Stephen Jones has been Headteacher since 2011. It has been rated as Excellent for current performance and Excellent for prospects for improvement by Estyn (2013) the school achieved its highest ever results in 2016 with 92% of students achieving Level 2+ (5 GCSEs including English and Mathematics) and a 100% achieving at least 5 GCSEs.