List of National Historic Sites of Canada in Montreal National Historic Sites National Historic Sites

| Site | Dates | Designated | Location_ | Description_ |
|---|---|---|---|---|
| Lachine Canal | 1825 (completed) | 1929 | Montreal , 45°27′30″N 73°36′42″W﻿ / ﻿45.45833°N 73.61167°W | An early 19th-century canal, 14 kilometres (8.7 mi) in length, built to circumvent white water on the St. Lawrence River; the head of a canal network linking the Great Lakes and the interior of the continent to the Atlantic Ocean |
| Lachine Canal Manufacturing Complex | 1825 (completed) | 1996 | Montreal , 45°27′30″N 73°36′42″W﻿ / ﻿45.45833°N 73.61167°W | An important manufacturing and industrial complex, with the number of firms and diversity of its output at its zenith (1880 to 1940) unparalleled elsewhere in Canada; at one time, over 20% of the workforce of the Island of Montreal was employed in the area |