William Ross, Baron Ross of Marnock, was the longest serving Secretary of State for Scotland, holding office from 1964 to 1970 and again from 1974-76, throughout the premiership of Harold Wilson.

The secretary of state for Scotland, also referred to as the Scottish secretary, is a secretary of state in the Government of the United Kingdom, with responsibility for the Scotland Office. The incumbent is a member of the Cabinet of the United Kingdom. Much of the Secretary of State for Scotland's responsibility transferred to the office of the First Minister of Scotland upon the re–establishment of both the Scottish Government and Scottish Parliament in 1999 following the Scotland Act 1998.