Viscount Dunrossil, of Vallaquie and of the Isle of North Uist in the County of Inverness, is a title in the Peerage of the United Kingdom. It was created in 1959 for the Conservative politician William Morrison upon his retirement as Speaker of the House of Commons. His son, the second Viscount, notably served as High Commissioner to Fiji and as Governor of Bermuda. As of 2017 the title is held by the latter's son, the third Viscount, who succeeded in 2000.
The viscountcy is the most recently created hereditary peerage created for a former Speaker which is still extant; all Speakers of the Commons after the 1st Viscount either received life peerages, died in office, or, having received a hereditary peerage, died without issue.
The family seat is Dunrossil House, near Lochmaddy, Isle of the North Uist.
Viscounts Dunrossil (1959)
The heir apparent is the present holder's son the Hon. Callum Alasdair Brundage Morrison (b. 1994)