William Drogo Montagu, 7th Duke of Manchester, KP (15 October 1823 – 22 March 1890), known as Lord Kimbolton from 1823 to 1843[1] and as Viscount Mandeville from 1843 to 1855, was a British peer and Conservative Member of Parliament.

William Montagu was born at Kimbolton Castle in 1823. He was the eldest son of George Montagu, 6th Duke of Manchester. His mother was Lady Millicent Sparrow, daughter of Brig. Gen. Robert Bernard Sparrow of Brampton Park, Huntingdonshire.[1]

He was MP for Bewdley 1848–1852 and Huntingdonshire 1852–1855.[1]

He joined the Canterbury Association on 27 May 1848. It was Edward Gibbon Wakefield's hope that Lord Mandeville would emigrate and be the aristocratic leader in the colony, but he did not go to New Zealand. Lord Mandeville and his grandmother, Lady Olivia Sparrow, both bought land in Riccarton, though. Between them, they held 500 acres (200 ha). Mandeville North near Kaiapoi is named after Lord Mandeville.