Clackmannanshire is the smallest county in Scotland, bounded on the north by Perthshire, on the east by Kinross and Fifeshire, on the south by the Firth of Forth, and on the west by Stirlingshire. It has an area of 55 square miles.
The Ochil Hills extend west to east through the center of the county. There are three rivers, the Forth, the Devon, and the Black Devon. Clackmannan is the county town, two miles east of Alloa, the chief town.