HMS Augustus (or Augusta) was a Thames sailing barge that the British Royal Navy purchased in 1795 and used as a gun-vessel of two or three guns. She was under the command of Lieutenant James Scott when she was wrecked at Plymouth on 7 July 1801. The sailing barges had a crew of 19 men, generally under the command of a sailing master. She had three commanders. In September 1796 Mr. J. Yates commissioned her. He commanded her through 1797. From 1798 to 1801 she was under the command of Mr. E.K. Foley.