Sir St George Gore-St George, 5th Baronet (25 June 1722 – 25 September 1746) was an Irish politician and baronet.
Born St George Gore, he was oldest son of Sir Ralph Gore, 4th Baronet and his wife Elizabeth Ashe, daughter of St George Ashe, Bishop of Clogher. In 1733, he succeeded his father as baronet. He assumed the additional surname of St George to inherit from his maternal grandfather. Gore-St George represented Donegal County in the Irish House of Commons from 1741 until his death in 1746. He was also appointed High Sheriff of Fermanagh in 1746.
On 22 September 1743, he married Anne Burton, only daughter of Francis Burton and sister of Francis Conyngham, 2nd Baron Conyngham. Gore-St George died without children, aged only 24, and was succeeded in the baronetcy by his younger brother Ralph. He was buried at Castletown.