The Lachine Canal (Canal de Lachine in French) is a canal passing through the southwestern part of the Island of Montreal, Quebec, Canada, running 14.5 kilometres from the Old Port of Montreal to Lake Saint-Louis, through the boroughs of Lachine, Lasalle and Sud-Ouest.

The canal gets its name from the French word for China (La Chine). The European explorers dreamt of finding a route from New France to the Western Sea and there on to China and hence auspiciously the region where the canal was built was named Lachine.

The canal is situated on land originally granted by the King of France to the Sulpician Order. Beginning in 1689, attempts were made by the French Colonial government and several other groups to build a canal that would allow ships to bypass the treacherous Lachine Rapids. After more than 130 years of failure, a consortium that included the young Scottish immigrant John Redpath was successful. John Richardson was Chairman of the Committee of Management of the canal project and its chief engineer was Thomas Brunett. The contractors were Thomas McKay and John Redpath, plus the firms of Thomas Phillips & Andrew White and Abner Bagg & Oliver Wait.