Nelson Square is a garden square located close to Southwark tube station in the London Borough of Southwark. It was laid out around 1807 as upmarket terraced housing and named after Admiral Horatio Nelson whose death during his victory at the Battle of Trafalgar in 1805 made him a national hero. It runs off Blackfriars Road to the west and Union Street to the north, while Great Suffolk Street is located a little to the east. The railway running towards Blackfriars Station passes near the eastern end of the square on a viaduct.