Cumbernauld and Kilsyth (Gaelic: Comar nan Allt agus Cill Saidh) is a burgh constituency of the Scottish Parliament covering part of the council area of North Lanarkshire. It elects one Member of the Scottish Parliament (MSP) by the plurality (first past the post) method of election. Under the additional-member electoral system used for elections to the Scottish Parliament, it is also one of nine constituencies in the Central Scotland electoral region, which elects seven additional members, in addition to nine constituency MSPs, to produce a form of proportional representation for the region as a whole. Following the second periodic review of Scottish Parliament boundaries, Cumbernauld and Kilsyth will form part of the new Central Scotland and Lothians West region from the 2026 Scottish Parliament election onwards.
The seat has been held by Jamie Hepburn of the Scottish National Party since the 2011 Scottish Parliament election.
The other eight constituencies of the Central Scotland Scottish Parliament region are: Airdrie and Shotts, Coatbridge and Chryston, East Kilbride, Falkirk East, Falkirk West, Hamilton, Larkhall and Stonehouse, Motherwell and Wishaw and Uddingston and Bellshill. The region covers all of the Falkirk council area, all of the North Lanarkshire council area and part of the South Lanarkshire council area.
From 2026, the other eight constituencies of the Central Scotland and Lothians West region will be Airdrie, Almond Valley, Bathgate, Coatbridge and Chryston, Falkirk East and Linlithgow, Falkirk West, Motherwell and Wishaw, and Uddingston and Bellshill.
The constituency was created at the same time as the Scottish Parliament, in 1999, with the name and boundaries of an existing Westminster constituency. In 2005, however, Scottish Westminster (House of Commons) constituencies were mostly replaced with new constituencies. Holyrood constituencies were themselves reviewed ahead of the 2011 Scottish Parliament election, however Cumbernauld and Kilsyth was left unaltered, being the only mainland seat to remain unchanged during this review. The seat also remained unchanged following the second periodic review of Scottish Parliament boundaries.
Cumbernauld and Kilsyth is one of four covering the North Lanarkshire council area, the others being Airdrie, Coatbridge and Chryston, and Motherwell and Wishaw; Uddingston and Bellshill spans parts of both North and South Lanarkshire. All five are within the Central Scotland electoral region.
Following the first Scottish Parliamentary Boundary Review the electoral wards forming Cumbernauld and Kilsyth were:
When redrawn following the second review of Scottish Parliament boundaries, the same electoral wards were used to redefine the seat.
Cumbernauld and Kilsyth (UK Parliament constituency)