Major-General Sir Luke O'Connor, VC, KCB (20 January 1831 – 1 February 1915) was an Irish-born soldier who served in the British Army.

He and his family were evicted from their farm because they were unable to pay the rent and decided to move to North America in 1839 in search of opportunity.

Although Luke returned to Ireland as a boy, some of his other siblings remained in North America and fought in the American Civil War.

On 20 September 1854, at the Battle of the Alma, Sergeant O'Connor was advancing between two officers, carrying the Colour, when one of them was mortally wounded.

Sergeant O'Connor was also shot at the same time, but recovering himself, he snatched up the Colour from the ground and continued to carry it until the end of the action, although urged to retire to the rear on account of his wounds.