Midlothian North is a county constituency of the Scottish Parliament covering part of the council areas of Midlothian. It will elect one Member of the Scottish Parliament (MSP) by the first past the post method of election from the 2026 Scottish Parliament election. Under the additional-member electoral system used for elections to the Scottish Parliament, it will also be one of nine constituencies in the Edinburgh and Lothians East electoral region, which will elect seven additional members, in addition to the nine constituency MSPs, to produce a form of proportional representation for the region as a whole. The seat was created by the second periodic review of Scottish Parliament boundaries in 2025, and covers areas that were previously in the former seat of Midlothian North and Musselburgh, alongside a small area gained from the seat of Midlothian South, Tweeddale and Lauderdale.
The other eight constituencies of the Edinburgh and Lothians East region are East Lothian Coast and Lammermuirs, Edinburgh Eastern, Musselburgh and Tranent, Edinburgh Central, Edinburgh Northern, Edinburgh North Western, Edinburgh North Eastern and Leith, Edinburgh South Western, and Edinburgh Southern. The region includes all of the City of Edinburgh and East Lothian council areas, and parts of the Midlothian council area.
Midlothian is represented in the Scottish Parliament by two constituencies. The Midlothian North seat is entirely within the Midlothian council area, whilst the Midlothian South, Tweeddale and Lauderdale also includes parts of the Scottish Borders. Following the second periodic review of Scottish Parliament boundaries in 2025, the Midlothian North constituency covers the following electoral wards of Midlothian Council: