Magdalena Sibylle, Duchess of Saxe-Weissenfels (2 September 1648 – 7 January 1681) was a German noblewoman.

[1] She was a daughter of August, duke of Saxe-Weissenfels, and his wife Anna Maria of Mecklenburg-Schwerin.

Her paternal grandparents were John George I, Elector of Saxony, and Magdalene Sibylle of Prussia.

On 14 November 1669, she married Duke Friedrich I of Saxe-Gotha-Altenburg.

[1] They had the following children: This article about a German duchess is a stub.