Friedrich August, Duke of Nassau, Prince of Nassau-Usingen was the last Prince of Nassau-Usingen and, jointly with his cousin, Friedrich Wilhelm of Nassau-Weilburg, first Duke of Nassau. He died without surviving male issue and was succeeded by his cousin's son, Wilhelm.
- Occupation
- military personnel, military officer
- Citizenship
- Duchy of Nassau
- Born
- April 23, 1738
- Died
- March 24, 1816
