Greensborough (2006 population estimated 5,000)[1] (Census Tract Number 5350403.03) is a community in the city of Markham in the Regional Municipality of York in the Canadian province of Ontario.

It includes the area north of 16th Avenue, west of Ninth Line, south of Major MacKenzie Drive and east of Markham Road.

The community has adopted a Smart Growth model which involves both low and medium density residential development along with low-density commercial and considerable park space scattered throughout.

Routes 9, 16, 18, and 25 terminate at Markham Stouffville Hospital in the east allowing passengers to connect to Viva (bus rapid transit) services.

on the western edge of the community; this service allows for long distance commutes to popular destinations such as York University and Union Station.