It is centred on St Ninian's Cathedral in Perth, and covers Fife, Perthshire, Kinross-shire, Clackmannanshire, and eastern and central Stirlingshire (western Stirlingshire is in the Diocese of Glasgow and Galloway).

The current Bishop of St Andrews, Dunkeld and Dunblane is Ian Paton.

The Diocese of Dunkeld is thought to have begun in the 9th century, but the first reliable date is that of the consecration of Cormac as bishop in 1114.

The line of bishops continued with only a few vacancies until, in 1842, the diocese was united with St Andrews.

In 1878, the Roman Catholic Church revived the Diocese of Dunkeld as part of its structures in Scotland.