Joshua Cooper (1732 – 16 December 1800)[1] was an Irish landowner and politician from County Sligo.
[2] He sat in the House of Commons of Ireland from 1761 to 1783, as a Member of Parliament (MP) for Castlebar from 1761 to 1768, and for County Sligo 1768 to 1783.
He inherited his father's estate of Markree Castle near Collooney.
On his death, Markree passed to his oldest son Joshua Edward Cooper (c. 1761–1837), who was an MP for County Sligo from 1790 to 1806.
[7][8] His great-grandson Edward Joshua Cooper, also an MP, was a noted astronomer who built Markree Observatory in the 1830s.