Albert Frederick (7 May, 1553 – 28 August, 1618) was duke of Ducal Prussia from 1568 until his death.

He was a son of Albert of Prussia and Anna Marie of Brunswick-Lüneburg. He was the second and last Prussian duke of the Ansbach branch of the Hohenzollern family.

He was married to Marie Eleonore of Cleves, a daughter of Wilhelm, Duke of Jülich-Cleves-Berg and Maria of Habsburg, Archduchess of Austria (1531–1581). Maria was a daughter of Ferdinand I, Holy Roman Emperor and Anne of Bohemia.

Albert Frederick and Marie were parents to seven children

• Anna of Prussia (3 July, 1576 - 30 August, 1625). Married John Sigismund, Margrave of Brandenburg.
• Marie of Prussia (23 January, 1579 - 21 February, 1649). Married Christian, Margrave of Brandenburg-Bayreuth.
• Albert Frederick of Prussia (1 June - 8 October, 1580).
• Sofie of Prussia (31 March, 1582 - 4 December, 1610). Married Jacob Kettler of Courland.
• Eleonore of Prussia (22 August, 1583 - 31 March, 1607).
• Wilhelm of Prussia (23 June, 1585 - 18 January, 1586).
• Magdalene Sibylle of Prussia(31 December, 1586 - 22 February, 1659). Married John George I, Elector of Saxony.

At his death the duchy passed to his son-in-law John Sigismund, Margrave of Brandenburg, combining the two territories under a single dynasty and forming Brandenburg-Prussia.

1553 births | 1618 deaths | House of Hohenzollern

Albrecht Friedrich von Preußen | Albrecht Fryderyk Hohenzollern | Albrekt Fredrik av Preussen