Alexander Morrison "Alistair" Carmichael is a British politician who has served as the Member of Parliament (MP) for Orkney and Shetland since 2001. A member of the Scottish Liberal Democrats, he currently serves as the Liberal Democrat Home Affairs, Northern Ireland and Justice spokesperson. He served as the Deputy Leader of the Scottish Liberal Democrats from 2012 to 2021.

Orkney and Shetland is a constituency of the House of Commons of the Parliament of the United Kingdom. It elects one Member of Parliament (MP) by the first past the post system of election. In the Scottish Parliament, Orkney and Shetland are separate constituencies. The constituency was historically known as Orkney and Zetland.