Major General Russell Mortimer Luckock, CB, CMG, DSO (27 November 1877 – 1950) was a British Army officer who served as colonel of the King's Own Royal Regiment (Lancaster).

Mortimer Luckock, the son of Rt. Rev. Herbert Mortimer Luckock,^[1] was commissioned as a second lieutenant in the King's Own Royal Regiment (Lancaster) on 17 February 1900,^[2] and shortly thereafter left for South Africa to serve in the Second Boer War. He took part in operations in the Orange Free State from April to June 1900, then in the Transvaal, including the defense of Vryheid in December 1900. Promotion to lieutenant came while he served in South Africa, on 21 July 1900, and he received the Queen's South Africa Medal with three clasps.^[3] After the war had ended in June 1902, he returned home with the SS Kinfauns Castle, leaving Cape Town in early August 1902.^[4]

Luckock later served in the First World War and went on to become Commandant of the Small Arms School in India in February 1922, commander of the 163rd Brigade in June 1926 and Brigadier on the General Staff at Southern Command in October 1928.^[5] After that he became General Officer Commander 54th (East Anglian) Infantry Division in September 1934.^[5] He also served as colonel of the King's Own Royal Regiment (Lancaster) (1945–47).^[5]