Blanchardstown is a large outer suburb located in the modern county of Fingal, Ireland, within the Leinster region. Situated approximately ten kilometres northwest of Dublin city centre, it serves as a significant urban hub in the surrounding area.
The area underwent significant development starting in the 1960s, expanding from its origins as a small village into a major residential and commercial zone. Today, Greater Blanchardstown constitutes the largest urban area within the county of Fingal.