USS Mount Whitney (LCC/JCC 20) is a 189m Blue Ridge-class command ship of the United States Navy; it is the flagship of the United States Sixth Fleet. She is also the command and control ship for the Commander Joint Command Lisbon and the Commander Striking Force NATO. She had previously served for years as the COMSTRIKFLTLANT(NATO Designation) / US Second Fleet's command ship.
She was classified as LCC-20 on 1 January 1969, and she was laid down on 8 January by Newport News Shipbuilding & Drydock Company, Newport News, Virginia.
Works on Mount Whitney has been standard dry-dock operations: general repair, maintenance, refitting, and painting.