Thomas Chatterton Hammond (born in Cork, Ireland on 20 February 1877 and died in Sydney, Australia on 16 November 1961) was an Irish Anglican cleric whose work on reformed theology and Protestant apologetics has been influential among evangelicals, especially in Ireland, Australia and South Africa. He was also Grand Master of the Grand Orange Lodge of New South Wales.
Born in Cork to Colman Mark Hammond a farmer and his second wife, Elizabeth (née Sergeant). After his father died in 1883 he lived for some time with a Roman Catholic aunt. He was educated at Cork Model School and at age 13 he went to work as a railway clerk. He became a member of the Church of Ireland in 1892. He also joined the newly formed YMCA in Cork and studied with John McNay (his future brother in law) the YMCA librarian.
At the age of 18 he entered the Irish Church Missions Training School in Dublin. Hammond was ordained as a deacon in the Church of Ireland in 1903 and priest in 1905. He was appointed curate of St. Kevin's Church, Camden Row, Dublin, and the Hammond family lived on nearby Synge Street. He received a BA in 1903 and subsequently an MA from Trinity College Dublin. Later in life he was awarded a ThD from the Australian College of Theology (ACT). He married Margaret McNay from Cork (of Scottish extraction but born in County Tipperary) in 1906, they had three sons; John Colman, Thomas Chatterton ('Chat'), Charles Kimble ('Carl') and a daughter, Doris.
He was superintendent of the Irish Church Missions to the Roman Catholics from 1919 to 1936, where he engaged in evangelistic missions in Dublin and often in controversies with Roman Catholic apologists. A lively intellectual, his expertise in doctrinal difficulty was often sought by the bishops of the Church of Ireland, but not always publicly acknowledged. Hammond also helped draw up the constitution of the Anglican Church of Australia (at that time called the Church of England in Australia) and safe-guarded the independence of the Diocese of Sydney. He was also helpful in drawing up a constitution for the Church of England in South Africa, a denomination which was created separately from the largely Anglo-Catholicism dominated Church of the Province of South Africa.