Vice-Admiral Sir Robert O'Brien FitzRoy KCB (2 April 1839 – 7 May 1896) was a Royal Navy officer who served as Commander-in-Chief, Channel Squadron.

[1] He served in the Second Opium War in 1857 and was promoted to captain in 1872.

[1] In 1878 he commanded HMS Alexandra, flagship of Admiral Sir Geoffrey Hornby through the Dardanelles to Constantinople and although he grounded the ship, it was later re-floated.

[2] On 16 April 1886 he was made a Naval Aide-de-Camp to the Queen.

[3] He served as Commander-in-Chief, Channel Squadron from 1894 to 1895[4] and was appointed KCB shortly before his death in 1896.