Henrietta von Osterhausen (died 6 November 1727, Dresden), was a German-Polish aristocrat. She is known as the mistress of Augustus II the Strong.
She was a lady-in-waiting to the Maria Josepha of Austria. She replaced Erdmuta Zofia von Dieskau as royal mistress in 1720. When the affair was over, Maria Josepha suggested that she become a nun. She did live for the Ursuline convent in Prague, but stayed there only as a guest for a couple of months. 
She married the noble Albrecht Zygmunt von Zeigut-Stanisławski on 22 February 1724.