Sir Chichester Fortescue (7 June 1750 – 22 March 1820) was an Irish admiral and MP.

The son of Chichester Fortescue

Chichester Fortescue (1718–1757)

Chichester Fortescue was an Irish Member of Parliament.He represented Trim in the Irish House of Commons between 1747 and 1757....

 by his wife Elizabeth, daughter of Richard Wesley, 1st Baron Mornington

Richard Wesley, 1st Baron Mornington

Richard Colley Wesley, 1st Baron Mornington was an Irish peer, best remembered as the grandfather of the 1st Duke of Wellington.Between 1729 and 1746 he represented Trim in the Irish House of Commons...

 (through whom he was a first cousin of Arthur Wellesley, 1st Duke of Wellington

Arthur Wellesley, 1st Duke of Wellington

Field Marshal Arthur Wellesley, 1st Duke of Wellington, KG, GCB, GCH, PC, FRS , was an Irish-born British soldier and statesman, and one of the leading military and political figures of the 19th century...

), he represented Trim

Trim (Parliament of Ireland constituency)

Trim was a constituency represented in the Irish House of Commons until 1800.-1692–1801:...

 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...

 from 1798 to the Act of Union 1800

Act of Union 1800

The Acts of Union 1800 describe two complementary Acts, namely:* the Union with Ireland Act 1800 , an Act of the Parliament of Great Britain, and...

. He also served as Ulster King of Arms, succeeding his younger brother Gerald in 1788, and was knighted that year.