It elected one Member of Parliament (MP) using the first-past-the-post voting system.
In 1975 most of the county plus the Isle of Bute became the Argyll district of the Strathclyde region.
Campbell resigned by accepting the office of Steward of the Chiltern Hundreds, causing a by-election.
McNeill resigned after being appointed a Senator of the College of Justice, becoming Lord Colonsay and causing a by-election.
Back to Election results Campbell resigned after being appointed Governor General of Canada.