James Graham, 4th Duke of Montrose, KT (16 July 1799-30 December 1874) was a British politician. He was the only son of his father's second marriage (to Caroline Marie Montagu, the daugher of the Duke of Manchester ). He married Caroline Agnes Beresford, the daughter of Lord Decies . During the mid-nineteenth century he occupied minor positions outside the cabinet in the short-lived governments of Lord Derby. He and his wife had one son, Douglas , who succeeded his father to the dukedom on the latter's death in 1874.

|- style="text-align: center;" | width="30%" |Preceded by:
Matthew Talbot Baines | width="40%" style="text-align: center;" |Chancellor of the Duchy of Lancaster
1858–1859 | width="30%" |Succeeded by:
Sir George Grey, Bt

|- style="text-align: center;" | width="30%" |Preceded by:
The Lord Stanley of Alderley | width="40%" style="text-align: center;" |Postmaster General
1866–1868 | width="30%" |Succeeded by:
Marquess of Hartington