List of historic buildings in Markham, Ontario

The earliest structures that were built in Markham, Ontario originated from indigenous settlements in the region, including the Iroquois, the Huron Wendat, the Petun and the Neutral Nation.

Buildings and structures in the registry are either listed as individual properties, or as a part of a larger heritage conservation district.

These conservation plans were created to protect historic buildings, and to ensure that new developments within these districts complement the "character of the neighbourhood".

The former is an open-air local history museum; while the latter serves as the city's "subdivision last resort", an area reserved for relocated heritage buildings that cannot be retained on their existing site.

The following were notable buildings and structures that were erected in Markham by 1850, but were later demolished: (near site of Bill Crothers Secondary School)