A.J. Blugerman, 16, was one of five people inside an SUV that plunged into the Don River near Lake Ontario Friday at around 5:30 p.m.
The teenager was pulled from the water and taken to the trauma unit of Sunnybrook Hospital in critical condition. Police said he was submerged for almost 30 minutes.
Blugerman died in hospital about five hours later.
The five teenagers were taking a ride in a 2009 Acura SUV.
According to Const. Clint Stibbe with Toronto police, the vehicle was travelling eastbound on Lakeshore Boulevard approaching Don Road when the driver lost control.
"The vehicle struck the north curb of the eastbound Lakeshore and then veered to the south side of the Lakeshore, and went through a guardrail and into the Keating Channel," Stibbe said.