James O'Hara, 2nd Baron Tyrawley and Kilmaine

The Lord Tyrawley
Left: John Montagu, 2nd Duke of Montagu (1690-1749) ; Centre, background: unknown minister of the church; right: James O'Hara, 2nd Baron Tyrawley (1682-1774)
Born	1682 Ireland
Died	14 July 1774 (aged 91 or 92) Twickenham, London
Buried at	Royal Hospital Chelsea
Allegiance	Kingdom of England  Kingdom of Great Britain
Service/branch	English Army  British Army
Years of service	1703–1773
Rank	Field Marshal
Battles/wars	War of the Spanish Succession Seven Years' War

Field Marshal James O'Hara, 2nd Baron Tyrawley and 1st Baron Kilmaine, PC (1682 – 14 July 1774), was an Irish officer in the British Army. After serving as a junior officer in Spain and the Low Countries during the War of the Spanish Succession, he went on to become British ambassador to Lisbon establishing a close relationship with King John V there. He undertook a tour as British ambassador to Saint Petersburg before becoming Governor of Gibraltar where he set about improving the fortifications. He was briefly commander of British troops in Portugal during the Seven Years' War but was replaced within a few months. During his military career he was colonel of eight different regiments.

Born the son of Charles O'Hara, 1st Baron Tyrawley, and Frances O'Hara (née Rouse), James O'Hara was commissioned as a lieutenant in the Royal Fusiliers on 15 March 1703. He was promoted to captain on 24 March 1705.

O'Hara fought at the Siege of Barcelona in April 1706 and was wounded at the Battle of Almansa in April 1707 during the War of the Spanish Succession. He was redeployed to the Low Countries as aide-de-camp to the Duke of Marlborough and was wounded again at the Battle of Malplaquet in September 1709. He succeeded his father as colonel of the Royal Fusiliers in January 1713 and then served with his regiment in Minorca for several years. For this he was appointed an aide-de-camp to the King in 1717 and, while serving in Ireland, was created Baron Kilmaine in the Peerage of Ireland on 2 January 1722. He succeeded his father as 2nd Baron Tyrawley in June 1724.