Robert John Reed, Baron Reed of Allermuir, is a Scottish judge who has been President of the Supreme Court of the United Kingdom since January 2020. He was the principal judge in the Commercial Court in Scotland before being promoted to the Inner House of the Court of Session in 2008. He is an authority on human rights law in Scotland and elsewhere; he served as one of the UK's ad hoc judges at the European Court of Human Rights. He was also a Non-Permanent Judge of the Court of Final Appeal of Hong Kong.

The President of the Supreme Court of the United Kingdom is equivalent to the now-defunct position of Senior Lord of Appeal in Ordinary, also known as the Senior Law Lord, who was the highest ranking among the Lords of Appeal in Ordinary. The President is not the most senior judge of the judiciary in England and Wales; that position belongs to the Lord Chief Justice. The current President is Robert Reed, since 13 January 2020.