Algernon Seymour

Algernon Seymour may refer to:


 * Algernon Seymour, 7th Duke of Somerset (1684–1750), MP for Marlborough and Northumberland
 * Algernon St Maur, 14th Duke of Somerset (former: Seymour, 14th Duke of Somerset, 1813–1894), English peer, father of the 15th Duke
 * Algernon Seymour, 15th Duke of Somerset (1846–1923), English peer, sailor, soldier and patron
 * Algernon Seymour (priest) (1886–1933), Anglican priest and Provost of St. Mary's Cathedral, Glasgow