The Grassmarket is an historic market square in the Old Town of Edinburgh, Scotland. In relation to the rest of the city the area is a hollow, well below surrounding ground levels.
The Grassmarket is located directly south-east of Edinburgh Castle with the castle dominating views northwards from the space. It adjoins the Cowgate to the east, the West Bow (leading to Victoria Street) to the north-east, King's Stables Road to the north-west and the West Port to the west. Leading off the Grassmarket from its south-west corner is the Vennel, on the east side of which can still be seen some of the best remaining parts of the Flodden and Telfer city walls.