Baroness Augusta Juliane "Julia" von Mengden (1719–1786) was a Livonian noblewoman of German descent, lady in waiting, favourite, an intimate friend and a confidante of the Russian regent Grand Duchess Anna Leopoldovna.
- Occupation
- lady-in-waiting
- Citizenship
- Russian Empire
- Born
- May 22, 1719, 1719
- Died
- October 21, 1787, 1786, 1787