Admiral Lord Amelius Beauclerk GCB GCH FRS (23 May 1771 – 10 December 1846) was a Royal Navy officer.
On 1 August 1811 he was promoted to rear-admiral, but during that and the two following years he continued in the North Sea, stretching in 1813 as far as the North Cape in command of a small squadron on the look-out for the American Commodore Rogers. In 1814 he commanded in the Basque Roads, and conducted the negotiations for the local suspension of hostilities. On 12 August 1819 he was advanced to vice-admiral, and from 1824 to 1827 was Commander-in-Chief at Lisbon and on the coast of Portugal. He became a full admiral on 22 July 1830, and was Commander-in-Chief, Plymouth from 1836 to 1839.
Beauclerk was a fine professional officer who benefited from his family connections to secure early promotion. Port Beauclerc, Point Amelius, Point St. Albans, Beauclerc Island, Beauclerc Peak and Amelius Island, all in Alaska, are named for him.
He died, unmarried, at his seat, Winchfield House, near Farnborough, Hampshire, on 10 December 1846.