John Creagh, CsSr was an Irish Redemptorist priest. Creagh is best known for, firstly, delivering antisemitic speeches in 1904 responsible for inciting riots against the small Jewish community in Limerick, as well as, secondly, his work as a Catholic missionary in the Kimberley region of Western Australia between 1916 and 1922.

The Redemptorists, officially named the Congregation of the Most Holy Redeemer, abbreviated CSsR, is a Catholic clerical religious congregation of pontifical right for men. It was founded by Alphonsus Liguori at Scala, Italy, for the purpose of labouring among the neglected country people around Naples. It is dedicated to missionary work and they minister in more than 100 countries. Members of the congregation are Catholic priests and consecrated religious brothers.