Isaac Corry FRS, PC (I), PC (15 May 1753 – 15 May 1813) was an Irish and British Member of Parliament and lawyer.
Born in Newry, he was the son of Edward Corry (d. 1792), sometime Member of Parliament, and Catharine Bristow. He was educated at the Royal School, Armagh, where his contemporaries included Viscount Castlereagh, and later at Trinity College, Dublin, from which he graduated in 1773. On 18 October 1771 he was admitted to the Middle Temple and called to the bar at King's Inns in 1779.
In 1776 Corry succeeded his father as Member of Parliament for Newry, sitting in the Irish House of Commons until the Act of Union in 1801. From 1782-1789 he served as equerry to the Duke of Cumberland, being described in 1794 by Rt. Hon. Sylvester Douglas as "a well-bred man...He has no brogue...He once acted as a sort of groom of the bedchamber to the late Duke of Cumberland." In 1798, he was also elected for Randalstown, but chose not to sit and in 1802, he was returned to the British House of Commons for Newry. He served as a Whig at Westminster until 1806. It was written in 1783 that Corry would expect to enter high office, given that "he lives expensively and does not pursue his profession, which is the law." In 1788 he became Clerk of the [Irish] Ordnance. The following year Corry was appointed a commissioner of the revenue. Finally in 1799 he was appointed Irish Chancellor of the Exchequer and a Lord High Treasurer of Ireland in place of Sir John Parnell, who quarrelled violently with Pitt over the projected union, which he categorically refused to support. In 1795 he became a Privy Councillor.