Saint Laurent Boulevard also known as Saint Lawrence Boulevard  is a major street in Montreal, Quebec, Canada. A commercial artery and cultural heritage site, the street runs north-south through the near-centre of city and is nicknamed The Main which is the abbreviation for "Main Street".

Saint Laurent Boulevard's cardinal direction, on a pseudo north-south axis strongly deported to the west, and aligned with the summer solstice's setting sun, was outlined by the Sulpicians towards the end of the XVII century. 

The first post-colonial landowners of the island, then preoccupied to develop a genuine urban cadastre on the Coteau Saint-Louis, built a small street, which they named Saint-Lambert, perpendicularly to Notre-Dame Street.

- Wikipedia