Colonel Nathaniel Montgomery-Moore (1757 – 4 December 1834) of Garvey, Co. Tyrone and Fassaroe Castle, Co. Wicklow was an Irish Member of Parliament. He was the son of General Alexander Montgomery (died 1785) of Ballyleck, Co. Monaghan, M.P. for County Monaghan in 1743–1760 and 1768–1783. He was elected an MP in the Parliament of Ireland for County Tyrone in 1781 and for Strabane in 1798 and was appointed High Sheriff of Tyrone for 1786–77. He was Colonel of the Tyrone Militia and led them against the rebels in 1798.