Caithness was a separate constituency the House of Commons of the Parliament of the United Kingdom from 1832 to 1918. (From 1708 to 1832 it was one of the Buteshire and Caithness alternating constituencies).
As a sepatate constituency it elected to every parliament one Member of Parliament| (MP) by the first past the post system of election. The constituency consisted of the traditional county of Caithness. In 1918 it was absorbed into the then new constituency of Caithness and Sutherland.
Members of Parliament
1832 George Sinclair
1841 George Traill
1869 Sir John George Tollemache Sinclair
1885 Gavin Brown Clark (Crofters' Party)
1900 Robert Leicester Harmsworth