Frederick Augustus may refer to:
- Frederick Augustus, Duke of Württemberg-Neuenstadt (1654 – 1716)
- 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 III, Elector of Saxony (1750–1827), who then became King Frederick Augustus I of Saxony
- 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 III of Saxony (1865 – 1932), last king of Saxony
Famous quotes containing the words frederick and/or augustus:
“It’s a pity you didn’t know when you started your game of murder, that I was playing, too.”
—Robb White, and William Castle. Frederick Loren (Vincent Price)
“I am not a literary man.... I am a man of science, and I am interested in that branch of Anthropology which deals with the history of human speech.”
—J.A.H. (James Augustus Henry)