Maria Amalia of Brandenburg-Schwedt (26 November 1670 in Cölln – 17 November 1739 at Bertholdsburg Castle in Schleusingen) was a princess from the Brandenburg-Schwedt line of the House of Hohenzollern and by marriage a Duchess of Saxe-Zeitz.

She was the daughter of the "Great Elector" Frederick William of Brandenburg from his second marriage with Sophia Dorothea of Schleswig-Holstein-Sonderburg-Glücksburg, daughter of Duke Philip of Schleswig-Holstein-Sonderburg-Glücksburg.

[1] In 1709, while she was a duchess, she visited the William Fountain, a medicinal spring in Schleusingen.

She died in 1739, at the age of 68, at the castle in Schleusingen that had earlier served as the seat of the Counts of Henneberg-Schleusingen.

Via her daughter, she was related to the Landgraviate family in Hesse and on that basis, she was buried in the royal crypt in the Martinskirche, Kassel.