thumb|Kimbolton Hall (1880), former seat of the Dukes of Manchester
George Montagu, 6th Duke of Manchester DL (9 July 1799 – 18 August 1855), known as Viscount Mandeville from 1799 to 1843, was a British peer and Tory Member of Parliament.
Early life
George Montagu was born at Kimbolton Castle, Huntingdonshire, on 9 July 1799. He was the eldest son of William Montagu, 5th Duke of Manchester and Lady Susan Gordon (1774–1828). Among his siblings were Lady Susan Montagu (wife of George Hay, 8th Marquess of Tweeddale) and Lady Caroline Montagu (wife of John Hales Calcraft MP for Wareham).
Manchester also served as Deputy Lieutenant of County Armagh.