Scottish Parliament constituencies and electoral regions

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The Scottish Parliament (Holyrood), created by the Scotland Act 1998, has used a system of constituencies and electoral regions since the first general election in 1999.

The parliament has 73 constituencies, each electing one Member of the Scottish Parliament (MSP) by the plurality (first past the post) system of voting, and eight additional member regions, each electing seven additional MSPs. Each region is a group of constituencies, and the D'Hondt method of allocating additional member seats from party lists is used to produce a form of proportional representation for each region. The total number of parliamentary seats is 129. For lists of MSPs, see Member of the Scottish Parliament.

Boundaries of Holyrood and House of Commons (Westminster) constituencies are subject to review by the Boundaries Scotland, and prior to the Scottish Parliament (Constituencies) Act 2004 reviews of Scottish Westminster constituencies would have been also reviews of Holyrood constituencies. The Arbuthnott Commission, in its final report, January 2006, recommended that council area boundaries and Holyrood and Scottish Westminster constituency boundaries should all be reviewed together. This recommendation has not been implemented.