Sir Robert Montgomery, GCSI, KCB (born 2 December 1809, Moville, County Donegal, Ireland – died 28 December 1887, India) was a British colonial administrator in India.
Montgomery was born at the family seat at New Park, Moville. He was educated at Foyle College, Derry; Wraxall Hall School, Wiltshire; and, from 1823 to 1825, at Addiscombe Military Seminary, Croydon, Surrey. In 1827 he was appointed to the Indian Civil Service.
He married in India and brought up a family. His second son was Henry Hutchinson Montgomery, father of Field Marshal Bernard Law Montgomery. Henry inherited the family estate in Ireland after his father's death.
His first notable position was as a commissioner in Cawnpore. In May 1857, at the start of the Indian Mutiny, he was in Lahore in the Punjab, where he was Judicial Commissioner (and in-charge of Chief Commissioner at Lahore) of the province. He immediately had the native garrison disarmed, which prevented them from taking any action in the rebellion. He was awarded with a knighthood for this action. During the period of 3 April 1858 to 15 February 1859, he was Chief Commissioner of Oudh. He was then the second Lieutenant-Governor of Punjab from 1859 to 1865, preceded by Sir John Lawrence and succeeded by Sir Donald McLeod. He served as Lieutenant-Governor up to an advanced age.