The ecclesiastical unit of Bijnor was created as an Apostolic Exarchate on 23 March 1972 by the Papal Bull “Beatorum Apostolorum” of Pope Paul VI and was entrusted to the Sacred Heart Province of the Carmelites of Mary Immaculate for the work of evangelization and Rev. Fr. Gratian Mundadan CMI was appointed the Apostolic Exarch.

The Apostolic Exarchate of Bijnorwas bifurcated from the Diocese of Meerut. It consists of the civildistricts of Bijnor (excluding the then tehsil of Dhampur), Pauri, Tehri, Uttarkashi and Chamoli of the then state of Uttar Pradesh. Later, the district of Haridwar was created, adding parts of Bijnor and Saharanpur and the district of Rudraprayag was created, dividing the district of Pauri.