Christianity took its roots in Garo Hills as early as in 1867 with the arrival of American Baptists. Fr. Rudolf Fontaine, a Salvatorian priest then residing in Guwahati, was the first Catholic Priest to visit Garoland in 1913.  In 1933, Frs A. Pianazzy sdb and Rocca sdb   opened the first Catholic mission at Tura. The missionary endeavors in Garo Hills received a great boost with the arrival of clergy from South India in 1956. The first Indian priests to set foot in Garo Hills were Frs. M.P. Alexander and Mathew Elanjipuram.   On   7 April 1973, Tura was made into a diocese by detaching territories from the Archdiocese of Shillong-Guwahati, comprising of East and West Garo Hills districts of Meghalaya and part of Goalpara district, south of Brahmaputra River in Assam.   Bishop Orestes Marengo sdb, former Bishop of Dibrugarh and later Bishop of Tezpur from which he resigned in 1969, was appointed Apostolic Administrator of Tura. 

The Holy Father Pope John Paul II relieved Bishop Marengo of the office of Apostolic Administrator on 8 February 1979 and appointed Rev. George Mamalassery of the diocesan clergy as the first bishop of Tura. When Guwahati archdiocese was erected in 1992, the areas under the diocese in Assam were entrusted to the new diocese and the ecclesiastical territory of Tura consisted only of all the districts of Garo Hills in Meghalaya.    On 17th June 2004, His Holiness Pope John Paul II, nominated Rev. Andrew R. Marak as the co-adjutor bishop of Tura. He was ordained bishop by Most Rev. Pedro Lopéz Quintana, Apostolic Nuncio to India on 3rd October 2004 at Tura.  On completion of 75 years of age on 22 April 2007, Pope Benedict XVI accepted the resignation of Bishop George, and appointed Bishop Andrew R. Marak as the Bishop of Tura.