The Diocese of Lucknow is a diocese of Church of North India headquartered in the city of Allahabad. The jurisdiction of the diocese mainly covers the Eastern side of Uttar Pradesh.
Diocese of Lucknow was established in 1893 carving it out from the Diocese of Calcutta. The Diocese was given the name of Lucknow though the mother Cathedral, All Saints Cathedral and Diocesan Headquarters stayed in Allahabad. It was because Allahabad was situated within the legally defined territories of the Diocese of Calcutta.
It is the biggest Diocese in Uttar Pradesh and one of the oldest dioceses in north India.