Earl of Gosford is a title in the Peerage of Ireland. It was created in 1806 for Arthur Acheson, 2nd Viscount Gosford.
The Acheson family descends from the Scottish statesman Sir Archibald Acheson, 1st Baronet of Edinburgh, who later settled in Markethill, County Armagh. He served as Solicitor General for Scotland, as a Senator of Justice (with the title Lord Glencairn), as an Extraordinary Lord of Session as 'Lord Glencairn', and as Secretary of State for Scotland. In 1628 he was created a baronet in the Baronetage of Nova Scotia, with remainder to his heirs male whatsoever. He was succeeded by his son from his first marriage, the 2nd Baronet. He married but died without male issue at a relatively early age and was succeeded by his half-brother, George, the 3rd Baronet, who settled in Ireland and was High Sheriff for cos. Armagh and Tyrone.
His son, the 4th Baronet, represented County Armagh in the Irish House of Commons. On his death the title passed to his son, the fifth Baronet. He sat as Member of the Irish Parliament for Mullingar. His son, the sixth Baronet, represented Dublin University and Enniskillen in the Irish House of Commons. In 1776 he was raised to the Peerage of Ireland as Baron Gosford, of Market Hill in the County of Armagh, and in 1785 he was further honoured when he was made Viscount Gosford, of Market Hill in the County of Armagh, also in the Peerage of Ireland.