Blanchardstown (Irish: Baile Bhlainséir) is a large suburb of Dublin in Fingal, Ireland. It is within the historical Barony of Castleknock. It is located 10 km north-west of the city centre. The suburb is in the Dublin 15 postal area, the Dublin West electoral constituency and the county of Fingal (following the abolition of County Dublin as an administrative division of the state). It is that Council's largest urban area. The 2011 Census recorded a population of 68,156 in Blanchardstown and its immediate environs.