Ignacy Posadzy SChr (February 17, 1898 – January 17, 1984) was a Polish Roman Catholic priest who ministered to Polish migrants from the interwar period, through World War II and during the rule of Communist Poland. At the direction of Venerable August Cardinal Hlond, he co-founded an order dedicated to serving Polish migrants, the Society of Christ. He served as Superior General of the Society from August 22, 1932 to July 5, 1968. In 1958, he founded an order of religious sisters, dedicated to serving Polish migrants, the Missionary Sisters of Christ the King.