Brigadier-General Marcus Beresford (1 June 1764 – 6 January 1803) was an Irish soldier and Member of Parliament.
He was a son of the Archbishop of Tuam, William Beresford, by his wife Elizabeth, sister of John FitzGibbon, 1st Earl of Clare.
[8] He represented St Canice in the Irish House of Commons from 1790[9] to 1794 and Swords from 1798 until the Act of Union 1800.
[11] The West Indies garrisons were infamous for mortality through tropical diseases, such as malaria and yellow fever.
[12][13] He died unmarried, predeceasing his father, who was created Baron Decies in 1812 and succeeded by Marcus's younger brother John in 1819.