List of historic buildings in Markham, Ontario

This is a list of historic building in Markham, Ontario, Canada. 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. However, Markham's oldest standing structures dates back to its earliest European settlers, who settled the area in 1794.
Historic buildings and structures are spread throughout Markham, although a number of historic buildings are clustered in four "heritage conservation districts," Buttonville, Markham Village, Thornhill, and Unionville. Development in the heritage conservation districts is required to follow municipal guidelines laid out in the heritage district's conservation plan. These conservation plans were created to protect historic buildings, and to ensure that new developments within these districts complement the "character of the neighbourhood".
List of historic buildings.
Most historic structures and properties are presently registered with the Markham Register of Property of Cultural Heritage Value or Interest. A number of buildings and properties listed on the registry are protected under the "Ontario Heritage Act". Buildings and structures in the registry are either listed as individual properties, or as a part of a larger heritage conservation district. The oldest structure listed on the registry is Philip Eckardt Log House, built in 1800. In addition to buildings that are listed on the registry, several of Markham's oldest buildings are situated at the Markham Museum, an open-air museum located next to the Markham Village heritage conservation district.
The majority of Markham's oldest standing structures were built as private residences, many of which are still used for that purpose. However, some residences have been re-purposed for commercial use.
1800 to 1849.
The following is a list of historic buildings from 1800 to 1849:
1850 to 1890.
The following is a list of structures built in Markham since 1850. 
List of lost buildings and structures.
Various historic structures have been burned down or demolished over time.