Tyrrelstown (Irish: Baile an Tirialaigh) is a townland in the civil parish of Mulhuddart, located 13 km northwest of the city of Dublin in Ireland and often considered as part of the greater Blanchardstown area. It is the site of a planned suburban development from the early 2000s. The local authority for the area, which forms part of the Dublin 15 postal district, is Fingal County Council.