John Frederick

John Frederick may refer to:
 * John Frederick of Holstein-Gottorp (1579–1634), Lutheran administrator of the prince-bishoprics of Bremen, Lübeck and Verden
 * John Frederick I, Elector of Saxony (1503–1554), known as "The Magnanimous"
 * , "the middle one" (1529–1595)
 * John Frederick, Duke of Württemberg (1582–1628)
 * John Frederick (London MP) (1601–1685), British Member of Parliament for Dartmouth, 1660–1661, and City of London, 1663–1679, and Lord Mayor of London
 * Sir John Frederick, 4th Baronet (1708–1783), British Member of Parliament for New Shoreham, 1740–1741, and West Looe, 1743–1761
 * Sir John Frederick, 5th Baronet (1750–1825), British Member of Parliament for Newport, 1774–1780, Christchurch, 1781–1790, and Surrey, 1794–1807
 * John Frederick, a pseudonym of Frederick Schiller Faust (1892–1944), an American western author known as Max Brand
 * John Frederick, Margrave of Brandenburg-Ansbach (1654–1686)
 * John Frederick (English cricketer) (1846–1907), English cricketer
 * John Frederick (Australian cricketer), Australian cricketer
 * John T. Frederick (1893–1975), literary editor, scholar, critic, and novelist
 * John Frederick, Duke of Saxe-Weimar (1600–1628), Duke of Saxe-Weimar
 * John Frederick, Count Palatine of Sulzbach-Hilpoltstein (1587–1644)
 * John Frederick, Duke of Brunswick-Lüneburg (1625–1679)
 * John Frederick, Duke of Pomerania (1542–1600)
 * John Frederick, Prince of Schwarzburg-Rudolstadt (1721–1767)
 * John W. Frederick Jr. (1923–1972), American Marine POW during the Vietnam War