Yonge Street (/jʌŋ/ YUNG) is a major arterial route in the Canadian province of Ontario connecting the shores of Lake Ontario in Toronto to Lake Simcoe, a gateway to the Upper Great Lakes. Ontario's first colonial administrator, John Graves Simcoe, named the street for his friend Sir George Yonge.
Once the southernmost leg of provincial Highway 11, linking the provincial capital with northern Ontario, Yonge Street has been referred to as "Main Street Ontario". Until 1999, the Guinness Book of World Records repeated the popular misconception that Yonge Street was 1,896 km (1,178 mi) long, making it the longest street in the world; this was due to a conflation of Yonge Street with the rest of Ontario's Highway 11. The street (including the Bradford-to-Barrie extension) is only 86 kilometres (53 mi) long. Due to provincial downgrading in the 1990s, no section of Yonge Street is marked as a provincial highway.