Dermot O'Hurley was a 16th-century Irish prelate who served as the Catholic Archbishop of Cashel. Born around 1530 in County Limerick, he was a highly educated scholar, holding a doctorate in law and teaching at universities in both Leuven and Reims. Following his appointment by Pope Gregory XIII in 1581, he traveled to Ireland during a period of intense political and religious conflict. He was eventually captured and executed in Dublin in June 1584, having refused to renounce his faith.