Before the Act of Union 1707, the barons of the shire or sheriffdom of Caithness elected commissioners to represent them in the unicameral Parliament of Scotland and in the Convention of Estates. After 1708, Caithness alternated with Buteshire in returning one member to the House of Commons of Great Britain and later to the House of Commons of the United Kingdom.

List of shire commissioners

1641: James Sinclair of Murkill 1648: Laird of Sandsyde (Innes) 1649–50: Sir John Sinclair of DunbeathG. E. C., The Complete Baronetage, volume II (1902) p. 391. 1661: James Sinclair of Murkill 1661–63: William Sinclair of Latheron and DunbeathComplete Baronetage, volume IV (1904) p. 431. 1665 convention: James Innes of Sandsyde 1667 convention, 1669–74: no representation 1678 convention: William Dunbar of HempriggsComplete Baronetage, volume IV, p. 390. 1678 convention: John Sinclair of Ulbster 1681–82: George Sinclair of Bilbster 1685–86, 1702-05: Sir George Sinclair of Clyth (died c.1705) 1689–93: James Sinclair of Freswick (died c.1693) 1693–95: Alexander Manson of Bridgend 1695–1701: Patrick Murray of Pennyland 1703–07: Sir James Sinclair of Dunbeath 1706–07: Sir James Dunbar of HempriggsComplete Baronetage, volume IV, p. 442.

References

See also List of constituencies in the Parliament of Scotland at the time of the Union