Admiral of the Fleet Sir George Astley Callaghan GCB, GCVO (21 December 1852 – 23 November 1920) was an officer in the Royal Navy.

He came to prominence again when, as Second-in-Command of the Mediterranean Fleet, he assisted with the provision of aid to survivors of the Messina earthquake, which had caused the loss of circa 123,000 lives.

There he met his successor-designate Sir John Jellicoe who had received orders from First Lord of the Admiralty Winston Churchill to relieve the ageing Callaghan of command of his fleet.

[3] In April 1900, Callaghan became commander of a naval brigade sent ashore to form an element of a larger expedition under Lieutenant-General Sir Alfred Gaselee as part of the British response to the Boxer Rebellion.

[3] He went on to be Captain of Portsmouth Dockyard early in 1904 and commanding officer of the battleship HMS Prince of Wales on the Mediterranean Station shortly thereafter.

[8] Appointed a Commander of the Royal Victorian Order on 3 August 1907,[11] he went on to be Second-in-Command of the Mediterranean Fleet with his flag in the battleship HMS Duncan in 1908.

[13] Promoted to vice-admiral on 27 April 1910,[14] he became Second-in-Command of the Home Fleet, with his flag in the battleship HMS King Edward VII later that month.

There he met his successor-designate Sir John Jellicoe, who had received orders from First Lord of the Admiralty Winston Churchill to relieve the ageing Callaghan of command of his fleet.

[8] He died at 11 Cadogan Court, Chelsea, London on 23 November 1920 and was given a funeral at Westminster Abbey,[2] following which he was buried in the churchyard of St Mary the Virgin at Bathwick, Somerset.