St Richard Gwyn Catholic High School is a Catholic co-educational voluntary aided secondary school situated on Albert Avenue in Flint, Flintshire, United Kingdom. It was founded in 1954 to serve the Catholic population of Flintshire. It is one of three Catholic secondary schools in the Roman Catholic Diocese of Wrexham, the others being St Joseph's Catholic & Anglican High School, Wrexham and Blessed Edward Jones Catholic High School, Rhyl.