The incident happened shortly after 11 p.m. in the Little Portugal area, near Lansdowne Avenue and Dundas Street West.
According to Toronto police, two suspects wearing all black fled the scene towards Queen Street West.
Toronto paramedics transported the victim to a pediatric trauma center via emergency. His injuries are serious but not life-threatening, they said.
Paramedics told CP24 no one else was evaluated at the scene.
STABBING:Lansdowne Av + Dundas St West 11:08pm- Reports one person stabbed @TPS11Div on scene- Two suspects fled to Queen wearing all black @TorontoMedics transporting teenager to hospital via EMS- Anyone with info call police#GO2109643 ^ lb
— Toronto Police Operations (@TPSOperations) October 30, 2022
Dundas from Lansdowne to St. Clarens was closed for a few hours as police investigated but has since reopened.
Anyone with information should call 416-808-1100 or Crime Stoppers anonymously at 416-222-8477 (TIPS) or www.222tips.com.