St. Paul's University College (formerly St. Paul's United College) is an affiliated institution of the University of Waterloo, located in Waterloo, Ontario, Canada. The college has two functions: first, it is a residence for both undergraduate and graduate students of the University; and, second, it offers classes to all University students. St. Paul's also offers guest rooms and conference services, and is home to the Waterloo Aboriginal Education Centre, and St. Paul's GreenHouse, a live-in social innovation community.