Before the Acts of Union 1707, the barons of the shire of Peebles elected commissioners to represent them in the unicameral Parliament of Scotland and in the Convention of the Estates.
From 1708, Peeblesshire was represented by one Member of Parliament in the House of Commons of Great Britain.
List of shire commissioners
1608 and 1609: Sir John Murray of Blackbarony
1617 and 1625: Sir Archibald Murray of Blackbarony
1621–25: Sir John Stewart of Traquair
1628–33: John Hay of Smithfield, Esquire of the Body
1628–33: 1630 convention: James Naismith of Posso
1630 convention, 1643, 1644–45, 1648: Laird of Dawick (Veitch)
1639–41: Sir Alexander Murray of Blackbarony
1639–41, 1644–45: David Murray of Stanehopes
1643: Sir James Hay of Smithfield
1645, 1648: Laird of Prestongrange (Morison)
1649-50: John Dickson of Hartrie, Senator of College of Justice
1649–51: Sir James Murray of Skirling
1661–63, 1665 convention, 1667 convention: Sir William Murray of Stanhope and Broughton
1661–63, 1665 convention, 1667 convention, 1669–74, 1678 convention, 1681–82, 1685–86, 1689 convention, 1689–98: Sir Archibald Murray of Blackbarony (died c.1700)
1678 convention: John Veitch the younger of Dawick
1681–82, 1689 convention, 1689–93: Sir David Murray of Stanhope and Broughton (expelled 1693)
1685–86: James Douglas of Skirling
1693–98: Alexander Murray of Halmyre
1700–02: Sir Alexander Murray of Blackbarony
1702-07: William Morison of Prestoungrange
1702-07: Alexander Horseburgh of that Ilk