John Loftus, 2nd Marquess of Ely KP (15 February 1770 – 26 September 1845), styled The Honourable John Loftus from 1785 to 1794 and Viscount Loftus from 1794 to 1806, was an Irish peer.

He was the son of Charles Loftus, 1st Marquess of Ely

Charles Loftus, 1st Marquess of Ely

Charles Tottenham Loftus, 1st Marquess of Ely KP, PC was an Irish peer and politician.Born Charles Tottenham, he assumed the surname of Loftus in 1783, after inheriting the estates of his uncle Henry Loftus, 1st Earl of Ely. He represented Fethard in the Irish House of Commons from 1776 to 1783...

. Loftus sat in the Irish House of Commons

Irish House of Commons

The Irish House of Commons was the lower house of the Parliament of Ireland, that existed from 1297 until 1800. The upper house was the House of Lords...

 for Wexford County

Wexford County (Parliament of Ireland constituency)

Wexford County was a constituency represented in the Irish House of Commons to 1800.-1692–1801:...

 from 1790 until the Act of Union in 1801. He then represented County Wexford

Wexford County (UK Parliament constituency)

Wexford County was a UK Parliament constituency in Ireland, which returned two Members of Parliament to the United Kingdom House of Commons.-Boundaries:...

 in the Parliament of the United Kingdom

Parliament of the United Kingdom

The Parliament of the United Kingdom of Great Britain and Northern Ireland is the supreme legislative body in the United Kingdom, British Crown dependencies and British overseas territories, located in London...

 until 1806, when he succeeded his father as marquess. On 3 November 1807, he was appointed a Knight of the Order of St Patrick. From 1800 to 1806, he was a Lord of the Treasury for Ireland.