The flag of Toronto, Ontario, Canada, was designed by Renato De Santis, a 21-year-old George Brown College student. It won in a 1974 competition held by the Old City of Toronto Flag Design Committee. After the city amalgamated in 1997, the new Toronto City Council looked for different designs from the public, but could not approve of any. De Santis suggested minor modifications to the original flag, which was adopted in October 1999, to create the current flag. The flag displays the twin towers of the Toronto City Hall on a blue background, with the red maple leaf of the flag of Canada at its base, representing the Council Chamber at the base of the towers. The shape of the space above and between the towers suggests the letter 'T', the city's initial.
A variation of this flag is used by Toronto Fire Services fireboat William Lyon Mackenzie. The marine ensign consists of the main city flag in the upper canton with a life preserver on two tone blue background.