Mountcharles (Irish: Tamhnach an tSalainn)[2][3][4] is a village and townland (of 650 acres) in the south of County Donegal, Ireland.

Before the Plantation of Ulster, the area from the present N56 to the sea, including modern day Salthill, was known as Tamhnach an tSalainn ('the Field of Salt').

[3] He is the ancestor of The 8th Marquess Conyngham (frequently, if inaccurately, known as 'Lord Henry Mountcharles') of Slane Castle, County Meath.

The courtesy title of the heir apparent of The Marquess Conyngham is Earl of Mount Charles, being named after the village.

Pursuant to patent signed and dated at Whitehall 9th December 1675 – granted to Sir Albert Conyngham, Kt.

Arthur Young, noted agriculturist and social and political observer, mentioned visiting Mountcharles in his book A Tour of Ireland (1776-1779).

It was sold by The 6th Marquess Conyngham immediately after the Second World War, in 1946, to pay for the installation of electricity in Slane Castle, County Meath.

The area also hosts a pilates and yoga centre as well as a massage therapist, a beauticians, several hairdressers and a barber shop.