Cyprian Michael Iwene Tansi (September 1903 – 20 January 1964) was an Igbo Nigerian ordained a Roman Catholic priest of the Archdiocese of Onitsha, Nigeria on 19 December 1937. He worked in the parishes of Nnewi, Dunukofia, Akpu/Ajalli and Aguleri.
He was later a Trappist Monk at Mount Saint Bernard Monastery in England. After being recommended by Cardinal Francis Arinze, who was inspired by Tansi as a boy (he had been one of Tansi's students and knew him personally), he was beatified by Pope John Paul II on 22 March 1998, who said, "Blessed Cyprian Michael Tansi is a prime example of the fruits of holiness which have grown and matured in the Church in Nigeria since the Gospel was first preached in this land. He received the gift of faith through the efforts of the missionaries, and, taking the Christian way of life as his own, he made it truly African and Nigerian."
His feast day is 20 January