The Billy Bishop Toronto City Airport (IATA: YTZ, ICAO: CYTZ), commonly known as the Toronto Island Airport and previously known officially as Toronto City Centre Airport, is a small airport located on the Toronto Islands in Toronto, Ontario, Canada. It is used for civil aviation, medical flights and regional airlines using turboprop planes. Since 2000, the airport has been a centre of controversy between community groups and Toronto politicians wishing to close the airport and the airport's operator, the Toronto Port Authority (TPA) and its primary tenant, Porter Airlines, who want to expand its usage.

The airport has had two previous official names. When it opened in 1939, it was named Port George VI Island Airport after the reigning monarch of the time. In 1994, it was renamed Toronto City Centre Airport. On November 10, 2009, the TPA officially renamed the airport to Billy Bishop Toronto City Airport after William Avery "Billy" Bishop. The airport continued to be listed in aeronautical publications and weather reports as Toronto City Centre Airport, until February 11, 2010.

The island airport location was used previously for park lands, hotels and cottages, as an amusement park and it was the site of Toronto's first professional baseball stadium. The stadium was the site of Babe Ruth's first professional home run, commemorated by a plaque near the Hanlan's Point docks on the island.