Coordinates: 53°19′56″N 6°16′31″W / 53.33222°N 6.27528°W Clanbrassil Street (Irish: Sráid Chlann Bhreasail) is a street in Dublin south of the city centre. It runs from Robert Emmet Bridge on the Grand Canal to New Street. It is served by several bus routes.
It is named after James Hamilton, 2nd Earl of Clanbrassil. Clanbrassil (from Irish: Clann Bhreasail, meaning "clan of Breasal") was the name of a Gaelic territory in what is now northern County Armagh.
From earliest times the street formed part of the Slige Chualann, which ran south from the settlement at Áth Cliath. It took its name from Cualu, the district in which Dublin was situated and which lay between the mouths of the Liffey and the Avoca (in County Wicklow).
In 1868, a new street was opened to connect Harold's Cross with Lower Clanbrassil Street. The Lord Mayor, the Aldermen and Frederick Stokes, who had purchased the land and led the project, attended the opening. The street was to be called Kingsland Street, but that name was never used and it became Upper Clanbrassil Street.