John Maxwell-Barry, 5th Baron Farnham PC (Ire) (18 January 1767 – 20 September 1838) was an Irish representative peer and politician.
In 1788, Maxwell-Barry stood as Member of Parliament for County Cavan, however, was declared not duly elected.
He later represented Doneraile in the Irish House of Commons from 1792 to 1798, and subsequently Newtown Limavady until the Act of Union in 1801.
In the House of Commons of the United Kingdom, he was Member of Parliament (MP) for Cavan from 1806 to 1824.
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