Midlothian North and Musselburgh is a constituency of the Scottish Parliament (Holyrood) covering parts of the council areas of Midlothian and East Lothian. It elects one Member of the Scottish Parliament (MSP) by the plurality (first past the post) method of election. It is one of nine constituencies in the Lothian electoral region, which elects seven additional members, in addition to the nine constituency MSPs, to produce a form of proportional representation for the region as a whole.