Air Canada Centre is Canada's premier sports and entertainment venue and home to the Toronto Maple Leafs Hockey Club, Toronto Raptors Basketball Club and the Toronto Rock Lacrosse Team. Air Canada Centre recently celebrated its tenth anniversary, having first opened its doors in February 1999.

Over its ten-year history, Air Canada Centre has been recognized with more than 25 industry awards and as of February 2009, it has hosted over 26.8 million fans at close to 2000 events including Leafs, Raptors and Rock games, as well as concerts and live events.

It is a multi-purpose indoor sporting arena and is the home of the Toronto Maple Leafs of the National Hockey League (NHL), the Toronto Raptors of the National Basketball Association (NBA), and the Toronto Rock of the National Lacrosse League (NLL). It was also home to the Toronto Phantoms of the Arena Football League (AFL) during their brief existence. The arena is popularly known as the ACC or the Hangar (the latter nickname coming from its sponsorship by Air Canada). The ACC is the 11th busiest arena in the world.

From its initial design to completion, it revolutionized many concepts now included in new arenas and stadiums such as luxury suites accessible on the ground floor, splitting the main scoreboard into several sections, rotating all sponsor signage in the bowl at once (to allow dominant messaging), and multiple restaurants in and out of the main arena bowl view.

The arena is owned by Maple Leaf Sports & Entertainment Ltd., the same group that owns both the Leafs and Raptors, and is 665,000 square feet (62,000 m²) in size.

It was started by the Toronto Raptors under its initial ownership group headed by Canadian businessman John Bitove. The groundbreaking was performed in March 1997.

The site was once occupied by the Canada Post Delivery Building. The current building retains the striking Art Deco façades of the east (along Bay Street) and south (Lake Shore Boulevard) walls of that structure, but the rest of the building (facing Union Station) was removed to make room for the arena, through the process of facadism.