James O'Hara, 2nd Baron Tyrawley

The Lord Tyrawley
Born	1682 Ireland
Died	14 July 1774 (aged 91 or 92) Twickenham, London
Buried	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.