Perth and North Perthshire is a county constituency of the House of Commons of the Parliament of the United Kingdom. It elects one Member of Parliament (MP) by the first past the post system of election. The constituency was created in 2005.

Campaigns in the seat have resulted in a minimum of 30% of votes at each election consistently for the same two parties' choice for candidate, and the next lower-placed party's having fluctuated between 8.1% and 18.7% of the vote since its relatively recent creation. The seat attracted a record seven candidates in 2015 and has seen as few as four, in 2017.

Further to the completion of the 2023 Periodic Review of Westminster constituencies, the seat will be subject to boundary changes which will entail the transfer of "North Perthshire" to the new constituency of Angus and Perthshire Glens, offset by the addition of Strathearn, Almond and Earn and Kinross-shire from the abolished constituency of Ochil and South Perthshire. As a result of these changes, it will be renamed Perth and Kinross-shire, to be first contested at the next general election.^[1]

As a result of the Fifth Periodical Review^[2] of the Boundary Commission for Scotland, the constituency (seat) was created to cover northern parts of the Perth and Kinross council area, and first used in the 2005 general election. Ochil and South Perthshire was created, at the same time, to cover the rest of that council area and the Clackmannanshire council area.

Before the 2005 election, these combined council areas had been covered by Angus, Ochil, Perth and North Tayside seats. The Perth seat lay within the Perth and Kinross council area, North Tayside covered a northern portion of that council area and a northern portion of the Angus council area, Angus covered a small southeastern portion of the Perth and Kinross council area, a southern portion of its associated council area, and northern portions of the Dundee City council area, and Ochil covered another southeastern portion of the Perth and Kinross council area, the whole of the Clackmannanshire council area and a southeastern portion of the Stirling council area.

The seat's voters stretch across the north of the Perth and Kinross local council area in Scotland. It is an affluent, predominantly rural seat with notable livestock, salmon, fishing, hospitality, tourism and fruit-growing sectors. In its south, around the River Tay is Perth and its adjacent villages. Perth includes a mix of affluent middle-class suburbs to the south-west and more deprived areas around its north.

Notwithstanding the possibility of breakthrough national and local campaigns and developments, campaigns to date have produced a close-run two-candidate contest as to the lion's share of the votes between the Conservative and the Scottish National Parties' candidates. During the main forerunner seat's existence (Perth and East Perthshire, created in 1950), it returned MPs loyal to the Unionist Party and the Conservative and Unionist Party after the parties amalgamated in 1965.

The seat was one of eleven in Scotland to elect an SNP MP to Parliament at the 1974 October general election. With a rearrangement (redistribution) of seats in 1979 the successor seat of North Tayside went on to return Conservative candidate Bill Walker to Parliament until he was defeated by John Swinney of the SNP at the 1997 UK general election - from that point onwards the seat elected successive SNP members as its MP. Conservatives narrowly missed out on gaining the seat at the 2005 UK general election: Douglas Taylor coming behind Pete Wishart by 1,521 votes. Wishart increased his majority such as with 9,641 votes clearance in 2015. The Conservative missed out on gaining the seat by 21 votes at the 2017 general election, the third-closest result in the nation after North East Fife and Kensington, but ahead of Kensington if ranked by percentage of the votes locally cast.^[3][4]