Viscount Templetown, named for a place in County Antrim, was a title in the Peerage of Ireland.
It was created on 13 February 1806 for John Upton, 2nd Baron Templetown, Member of Parliament for Bury St Edmunds.
He was the son of Clotworthy Upton, who served as Clerk Comptroller to Augusta, Dowager Princess of Wales.
He was a general in the Army and also sat as Conservative Member of Parliament for County Antrim from 1859 to 1863.
Three other members of the Upton family of some notability are: Arthur Upton, brother of the first Baron, who represented Carrickfergus in the Irish House of Commons, Fulke Howard (who assumed the surname of Howard in 1807), second son of the first Baron, who was Member of Parliament for Castle Rising, and Arthur Upton, third son of the first Baron, a cricketer and politician.