The Markham Fair is hosted by the Markham and East York Agricultural Society, and supported by both the City of Markham and the Town of Whitchurch–Stouffville (Stouffville south of Main Street was part of Markham Township prior to 1971). The Markham Fair dates back to 1844 and is one of Canada's oldest and largest fairs, hosting upwards of 80,000 visitors. The fair is held on the weekend before Thanksgiving. It is held at the Markham fairgrounds, directly south of the Stouffville town border.