Lord Castlereagh (or simply Castlereagh) was launched in 1803 at Cochin and spent her entire career as a country ship based in Bombay. She made several voyages to China, during the first of which she was present at the battle of Pulo Aura. She also made a few voyages to England, including one for the British East India Company (EIC). She participated as a transport in the British Invasion of Isle de France. She was lost in 1840 at Bombay coming into harbour.