Admiral Sir John Wentworth Loring, KCB, KCH (13 October 1775 – 29 July 1852) was a Royal Navy officer of the early nineteenth century who is best known for his service in the Napoleonic Wars as a frigate commander.

Born in the Thirteen Colonies at the outbreak of the American War of Independence, Loring's family fled to Britain and he subsequently joined the Royal Navy aged 13.

He subsequently served throughout the following 23 years of warfare between Britain and France, achieving success in command of the frigate HMS Niobe.

John's grandfather, Joshua Loring, had served in the navy in the Seven Years' War, commanding a squadron on the Great Lakes.

Loring was badly wounded early in the conflict at the Siege of Toulon, but in 1794 was in independent command of a gunboat at the Siege of Bastia and later served in the sloop HMS Fleche before joining Admiral Sir Hyde Parker's flagship HMS St George, seeing combat at the Battle of Genoa and the Battle of Hyères Islands in 1795.