Cumbernauld and Kilsyth (Gaelic: Comar nan Allt agus Cill Saidh) is a constituency of the Scottish Parliament (Holyrood) covering part of the council area of North Lanarkshire.

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.

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.

[2] 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.

[3] Cumbernauld and Kilsyth is one of four covering the North Lanarkshire council area, the others being Airdrie and Shotts, Coatbridge and Chryston, and Motherwell and Wishaw; Uddingston and Bellshill spans parts of both North and South Lanarkshire.