Countess Maria Wilhelmina von Neipperg (later Princess of Auersperg) (30 April 1738 - 21 October 1775) was an Austrian noble and court official, known as the mistress of Francis I, Holy Roman Emperor.

She was born as the third child and the youngest daughter of Imperial Count Wilhelm Reinhard von Neipperg and his wife, Countess Maria Franziska Theresia von Khevenhüller-Frankenburg (1702-1760).

He had begun to lose interest in his wife, Maria Theresa of Austria, who by then had bore him 16 children.

[1][2][3] In April 1756, she married Prince Johann Adam Joseph von Auersperg (1721-1795), upon the wish of the Empress Maria Theresa.

She remained in a liaison with the Emperor until his death in 1765,[4] however she never had any position of being an official mistress, and their relationship, though known, was never confirmed.