Admiral Sir Peter Halkett, 6th Baronet (c. 1765 – 7 October 1839) was a senior Royal Navy officer of the early nineteenth century who is best known for his service in the French Revolutionary Wars. The younger son a Scottish baronet, Halkett joined the Navy and by 1793 was a lieutenant, becoming a post captain after service at the Siege of Williamstadt in the Netherlands. He later commanded the frigate HMS Circe during the Battle of Camperdown in 1797 and later achieved success in the Caribbean in command of HMS Apollo. He was made a rear-admiral in 1812, but his first major command was in the West Indies in 1836, lasting two years. Shortly before his death he inherited the Halkett Baronetcy from his brother Charles, later passing it to his son John.