Admiral Sir Lewis Anthony Beaumont, GCB, KCMG (19 May 1847 – 20 June 1922) was a Royal Navy officer who served as Commander-in-Chief, Plymouth.

Beaumont joined the Royal Navy as a boy in 1860 and was engaged in operations in Malaya by 1875.

[3] Between 1875 and 1876 he took part as senior lieutenant in the British Arctic Expedition led by George Nares on HMS Discovery, an attempt to reach the North Pole and to explore the northwest coast of Greenland.

Beaumont led a dogsled party that reached Sherard Osborn Fjord in May 1876 and left a cairn at Repulse Harbour.

[8] During his time in Australia, he had HMS Royal Arthur as his flagship, and he was knighted as a Knight Commander of the Order of St Michael and St George (KCMG) on the occasion of the visit to Australia of the Duke and Duchess of Cornwall and York (later King George V and Queen Mary).