Peter Browne, 2nd Earl of Altamont (c. 1731 – 28 December 1780) was an Anglo-Irish politician and landowner.

He was the son of John Browne, 1st Earl of Altamont, and Anne Gore, and was involved in organising the construction of the town of Westport, County Mayo with the architect William Leeson.

She was the daughter of Denis Kelly, former Chief Justice of Jamaica and his wife Priscilla Halstead.

[1] The Jamaican slave plantations as well as the Lisduff and Spring Garden estates, both in the civil parish of Tynagh, Barony of Leitrim (County Galway) thus passed into the ownership of the Browne family.

Their daughter, Favell Bourke Lee, married David Bevan, a British banker of Barclay, Bevan, Bennin, Tritton (forerunners of Barclays Bank DCO).