Sir John Newport, 1st Baronet (24 October 1756 – 9 February 1843) was an Anglo-Irish Whig politician who served as Chancellor of the Exchequer of Ireland.

Born on 24 October 1756, he was the son of Simon Newport, a banker at Waterford, by his wife, Elizabeth, daughter of William Riall of Clonmel.

He took part in the convention of volunteer delegates which met in Dublin under the presidency of James Caulfeild, 1st Earl of Charlemont in November 1783, and was appointed a member of the committee of inquiry into the state of the borough representation in Ireland.

At the 1802 general election, he unsuccessfully contested the Waterford City for the Whig interest against William Congreve Alcock.

[3] On the formation of the Ministry of All the Talents, Newport was appointed Chancellor of the Irish exchequer (25 February 1806), and was sworn a member of the English privy council on 12 March 1806.

[1] Newport did not accept office in Lord Liverpool's administration, because the government was averse to measures of Catholic emancipation.