The main quad at the University of Illinois is located in the center of campus and is surrounded by the main academic buildings.

A web cam "The Quad Cam" shows a live video feed of the quad from the roof Foellinger.

Every year at the beginning of the semester there is Quad Day, where all of the registered student organizations line up around the quad to recruit new members and give out free swag.

The south quad is just south of the main quad and the undergraduate library and is known as the business quad. The engineering quad or John Bardeen Quad is just north and holds the majority of Engineering campus and Grainger Library.