John Frederick
John Frederick may refer to:
- John Frederick of Holstein-Gottorp, Lutheran administrator of the prince-bishoprics of Bremen, Lübeck and Verden
- John Frederick I, Elector of Saxony, known as "The Magnanimous"
- , "the middle one"
- John Frederick, Duke of Württemberg
- John Frederick , British Member of Parliament for Dartmouth, 1660–1661, and City of London, 1663–1679, and Lord Mayor of London
- Sir John Frederick, 4th Baronet, British Member of Parliament for New Shoreham, 1740–1741, and West Looe, 1743–1761
- Sir John Frederick, 5th Baronet, British Member of Parliament for Newport, 1774–1780, Christchurch, 1781–1790, and Surrey, 1794–1807
- John Frederick, a pseudonym of Frederick Schiller Faust, an American western author known as Max Brand
- John Frederick, Margrave of Brandenburg-Ansbach
- John Frederick , English cricketer
- John Frederick, Australian cricketer
- John T. Frederick, literary editor, scholar, critic, and novelist
- John Frederick, Duke of Saxe-Weimar, Duke of Saxe-Weimar
- John Frederick, Count Palatine of Sulzbach-Hilpoltstein
- John Frederick, Duke of Brunswick-Lüneburg
- John Frederick, Duke of Pomerania
- John Frederick, Prince of Schwarzburg-Rudolstadt
- John W. Frederick Jr., American Marine POW during the Vietnam War