Isaac Mann (December 1710 – 10 December 1788) was Church of Ireland Bishop of Cork and Ross from 1772 to 1788.

Mann was born in Norwich in 1710 and was brought to Ireland as a child, being supported by Lord Chancellor of Ireland Robert Jocelyn, 1st Viscount Jocelyn. He served as Jocelyn's household chaplain for several years. It was a standing joke in Dublin that Mann was frequently mistaken for Jocelyn, since Mann had far more of the grand manner than Jocelyn, who was notably modest and unassuming.Ball, F. Elrington "The Judges in Ireland 1221-1921" London John Murray 1926

Mann was educated at Trinity College, Dublin, obtaining a scholarship in 1730."Alumni Dublinenses: a register of the students, graduates, professors and provosts of Trinity College in the University of Dublin (1593-1860)Burtchaell, G.D/Sadlier, T.U p552: Dublin, Alex Thom and Co, 1935 He was Archdeacon of Dublin"Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 2" Cotton, H. p131 Dublin, Hodges & Smith, 1848-1878 from 1757 until his elevation to the episcopate."Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 1" Cotton, H. p233 Dublin, Hodges & Smith, 1848-1878

Mann died in Bath, Somerset in 1788. He was buried in Ballinaspic, then his remains were transferred to Saint Fin Barre's Cathedral in 1861.

He had no children of his own but adopted his nieces Frances and Susannah Mann. Frances married Christopher Townshend, and Susannah married the Venerable Joseph Weld, Archdeacon of Ross.

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