Isaac Barré

The Right Honourable Isaac Barré
Colonel Barré, c. 1765, by Douglas Hamilton
In office 1782
Treasurer of the Navy
Monarch	George III
Prime Minister	Lord Rockingham
Preceded by	Welbore Ellis
Succeeded by	Henry Dundas
Paymaster of the Forces
In office 1782–1783
Monarch	George III
Prime Minister	The Earl of Shelburne
Preceded by	Edmund Burke
Succeeded by	Edmund Burke
Personal details
Born	1726 (1726) Dublin, Ireland
Died	20 July 1802 (1802-07-21) Mayfair, London, England
Resting place	St. Mary Churchyard, East Raynham, England
Nationality	Irish
Political party	Whig
Alma mater	Trinity College, Dublin

Isaac Barré (1726 – 20 July 1802) was an Irish soldier and politician. He earned distinction serving with the British Army during the Seven Years' War and later became a prominent Member of Parliament, in which role he became a vocal supporter of William Pitt. He is known for coining the term "Sons of Liberty" in reference to American Whigs opposed to the British government's policies.

He was the son of Peter Barré, a Huguenot refugee living in Dublin as a linen dealer, who became high sheriff of Dublin (1756). He was educated at Trinity College. While his parents had hoped he would study law, and although he had potential as an actor, Barré instead entered the British Army in 1746.

After studying at Trinity College, he joined the 32nd regiment of foot as an ensign in 1746, and was promoted to lieutenant in 1755, and captain in 1756. He served under his patron General James Wolfe on the Rochefort expedition of 1757, when he first met Lord Shelburne, and afterwards in Canada where he was appointed adjutant-general, fighting at both Louisbourg (1758) and Quebec (1759). In the Quebec expedition, in which Wolfe was killed, Barré was severely wounded by a bullet in the cheek and lost the use of his right eye, and was among the group gathered around the dying Wolfe, immortalised in Benjamin West's celebrated picture.