Ernest August

Ernest Augustus or Ernst August may refer to:

Royalty

House of Hanover

• Ernest Augustus, Elector of Hanover (1629–1698), father of King George I of Great Britain
• Ernest Augustus, Duke of York and Albany, Prince-Bishop of Osnabrück, son of the previous
• Ernest Augustus I of Hanover (1771–1851), son of King George III of the United Kingdom
• Ernest Augustus, Crown Prince of Hanover, (1845–1923), son of George V of Hanover
• Ernest Augustus, Duke of Brunswick (1887–1953), son of the previous
• Ernest Augustus IV, Prince of Hanover (1914–1987) or Ernst August Prinz von Hannover Sr, son of the previous
• Ernst August V, Prince of Hanover (born 1954) or Ernst August Prinz von Hannover Jr, son of the previous
• Prince Ernst August of Hanover (born 1983), son of previous

House of Wettin

• Ernest Augustus I, Duke of Saxe-Weimar-Eisenach (1688–1748)
• Ernest Augustus II, Duke of Saxe-Weimar-Eisenach (1737–1758), son of the previous