The Sheriff of Bute was historically the office responsible for enforcing law and order on the Isle of Bute, Scotland and bringing criminals to justice.
Before the Jacobite uprising of 1745, the office was typically hereditary, eventually shifting to salaried sheriffs by 1748.
The sheriffdom was combined with Dumbarton in 1854 to form the sheriffdom of Dumbarton & Bute. In 1871 it was split and Bute was combined with Renfrew to form the sheriffdom of Renfrew & Bute. The sheriffdom was split again in 1946, when Bute was combined with Ayr to form the sheriffdom of Ayr & Bute.