Admiral Sir Manley Dixon, KCB (3 January 1757 – 8 February 1837)[1] was a prominent Royal Navy officer during the late eighteenth and early nineteenth centuries.

In 1798, Dixon sailed in the 64-gun ship of the line HMS Lion for the Mediterranean Fleet under Vice-Admiral Earl St Vincent based in the Tagus.

There he was assigned to the blockade of Cartagena and on 15 July 1798 fought an action against four Spanish frigates, successfully dividing the squadron and capturing the Santa Dorothea.

In March 1800, the French ship of the line Guillaume Tell attempted to break out of Valletta and was intercepted by a British squadron including Lion.

During the ensuing battle Dixon was heavily engaged and inflicted severe damage on his French opponent, which was eventually forced to surrender.