The Isle of Bute, known as Bute, is an island in the Firth of Clyde in Scotland, United Kingdom. It is divided into highland and lowland areas by the Highland Boundary Fault.
Formerly a constituent island of the larger County of Bute, it is now part of the council area of Argyll and Bute. Bute's resident population was 6,498 in 2011, a decline of just over 10% from the figure of 7,228 recorded in 2001 against a background of Scottish island populations as a whole growing by 4% to 103,702 for the same period.