Frederick Augustus

Frederick Augustus (Friedrich August), may refer to:


 * Frederick I, Holy Roman Emperor (1122–90), better known as Frederick Barbarossa
 * Frederick Augustus, Duke of Württemberg-Neuenstadt (1654–1716)
 * Friedrich August of Hanover, Prince (1661-1690), younger brother of King George I of Great Britain
 * Frederick Augustus I, Elector of Saxony (1670–1733), better known as King Frederick August II of Poland
 * Frederick Augustus II, Elector of Saxony (1696–1763) better known as King August III of Poland
 * Frederick Augustus I, Duke of Oldenburg (1711–1785)
 * Frederick Augustus, Prince of Anhalt-Zerbst (1734–93)
 * Frederick Augustus, Duke of Nassau (1738–1816)
 * Frederick Augustus, Prince of Brunswick-Wolfenbüttel-Oels (1740–1805)
 * Frederick Augustus III, Elector of Saxony (1750–1827), who then became King Frederick Augustus I of Saxony
 * Frederick Augustus, Count of Erbach-Fürstenau (1754–1784)
 * Prince Frederick, Duke of York and Albany (1763–1827), son of George III of the United Kingdom
 * Frederick Augustus II of Saxony (1797–1854)
 * Frederick Augustus II, Grand Duke of Oldenburg (1852–1931)
 * Frederick Augustus III of Saxony (1865–1932), last king of Saxony