Ochil and South Perthshire was a county constituency of the House of Commons of the Parliament of the United Kingdom.

Agriculture and tourism formed an important part of the local economy in the north of the constituency in southern Perth and Kinross-shire, housing affluent resort towns such as Auchterarder, Crieff and Kinross.

Ochil covered the counties of Kinross-shire and Clackmannanshire, alongside some of the more industrialised parts of Stirlingshire, traditionally an SNP-Labour marginal.

When Ochil and South Perthshire was first formed, it was thought of as an SNP-Labour marginal; however, the SNP failed to win the constituency when it was created in 2005, and at the subsequent general election in 2010.

Prior to the 2005 election, the council areas had been covered by the Angus, Ochil, Perth and North Tayside constituencies.