The Royal Canadian Institute, or RCI, is an organization dedicated to the advancement of science.

First formed in 1849 by Sir Sandford Fleming, it was incorporated in 1851, and is today the oldest scientific society in Canada. Notable presidents include William Edmond Logan and Henry Holmes Croft. It was formerly called The Canadian Institute.

Every year they host two series of lectures, fall and winter, hosted at the University of Toronto.

See also

• John Charles Fields – Former President of the Institute

• List of Canadian organizations with royal patronage

• Monarchy of Canada