Henry Monck Mason Hackett (1 March 1849[1] -24 December 1933 [2]) was Dean of Waterford from 1903 until 1913.
Hackett was educated at Trinity College, Dublin[3] and ordained in 1875.[4] After a curacy in Banbridge he was a CMS Missionary in Benares from 1877 to 1881; and was at Allahabad from 1881 to 1886. He was the Minister of Christ Church, Richmond, Surrey[5] from 1886 to 1888; and of Christ Church, Hampstead from 1892 to 1894. He was Missionary-Principal of St Paul’s Divinity School, Allahabad from 1892 to 1896; and Principal of Montreal Diocesan Theological College from 1898 until his appointment as Dean. After his years in Waterford he was the Vicar of St Peter, Belsize Park[6] from 1913 to 1929.[7]