Robert Adam (3 July 1728 - 3 March 1792) was a Scottish neoclassical architect, interior designer and furniture designer. He was the son of William Adam (1689-1748), Scotland's foremost architect of the time, and trained under him. With his older brother John, Robert took on the family business, which included lucrative work for the Board of Ordnance, after William's death.

In 1754 he left for Rome, spending nearly five years on the continent studying architecture under Charles-Louis Clérisseau and Giovanni Battista Piranesi. On his return to Britain, he established a practice in London, where he was joined by his younger brother James. Here he developed the "Adam Style", and his theory of "movement" in architecture, based on his studies of antiquity. He became one of the most successful architects of his day, and held the post of Architect of the Kings Works from 1761-1769.

He is considered by many to be the greatest architect of the late 18th century, and his work influenced the development of Western architecture, both in Europe and in North America. He was leader of the first phase of the classical revival in England and Scotland from around 1760 until his death. His rival Sir William Chambers was the leading official British architect of the era, but Adam received many important commissions from private clients and had a more lasting stylistic influence.