Perth was a constituency of the House of Commons of the Parliament of the United Kingdom from 1832 to 1918, 1918 to 1950, and 1997 to 2005. From 1832 to 1918 it was a burgh constituency. From 1918 to 1950, and 1997 to 2005, it was a county constituency. During each of the three periods it elected one Member of Parliament (MP).

Perthshire, officially the County of Perth, is a historic county and registration county in central Scotland. Geographically it extends from Strathmore in the east, to the Pass of Drumochter in the north, Rannoch Moor and Ben Lui in the west, and Aberfoyle in the south; it borders the counties of Inverness-shire and Aberdeenshire to the north, Angus to the east, Fife, Kinross-shire, Clackmannanshire, Stirlingshire and Dunbartonshire to the south and Argyllshire to the west. It was a local government county from 1890 to 1930.