Donald McKay was an extreme clipper designed by Donald McKay, his last. Built for James Baines & Co., she sailed on the Black Ball Line of Liverpool from 1855 to 1868, carrying passengers and mail between England and Australia.

Donald McKay achieved several notable voyages during her active years. One of her most significant accomplishments was setting a record for the fastest voyage from Liverpool, England, to Melbourne, Australia, completing the journey in just 63 days.

Unfortunately, like many other clipper ships, her commercial success was relatively short-lived. The advent of steam-powered ships and changes in maritime transportation gradually rendered all sailing vessels less economically viable, especially the fast but limited hull displacement clippers.

Donald McKay ended her days as a coal hulk in Portugal. Her figurehead is located at the Mystic Seaport Museum in Mystic, Connecticut, USA.

Donald McKay was launched on Donald McKay's shipyard in East Boston, USA, in January 1855. Newspapers reported that she had "all the airy beauty of a clipper combined with the stately outline of a ship of war and, though not sharp, yet her great length, buoyancy, and stability, indicate[d] that she [would] sail very fast, and be an excellent sea boat". Her passenger capacity was reported at 591 plus crew.