Count Frederik of Ahlefeldt-Rixingen (German: Friedrich von Ahlefeldt; 1623 in Søgård – 7 July 1686, in Copenhagen) was a Danish landowner and statesman.

Ahlefeldt was born on Søgård Manor, east of Kliplev in the Duchy of Schleswig as the eldest child and only son of Frederik of Ahlefeldt-Seestermühe (1594-1657) and his wife and relative, Birgitte of Ahlefeldt-Graasten (1600-1632).

At age twenty, Ahlefeldt was sent on an educational tour of Europe, where over a six-year period he studied at universities in Jena, Bologna, Paris and Amsterdam.

[citation needed] During the early and mid 1660s he belonged to the influential circle around Hannibal Sehested, Hans Svane, Peter Bülche, Petersen and Theodor Lente, who became increasingly opposed to Frederick III's favorite Christoffer Gabel.

[6] Ahlefeldt and Margarethe Dorothea had two children: On 1 December 1668 he married Countess Marie Elisabeth of Leiningen-Hartenburg-Dagsburg (10 March 1648, Hartenburg – 13 April 1724, Augustenburg), daughter of Friedrich Emich, Count von Leiningen-Dagsburg-Hartenburg (1621-1698) and his wife, Countess Sibylla von Waldeck (1619-1678), daughter of Christian, Count of Waldeck-Wildungen (1585-1637).