The 1974 Act defined the constituency's boundaries as consisting of the following wards of the county borough of Dublin: Drumcondra South C, Finglas East A, Finglas East B, Finglas East D, Finglas East E, Finglas East F, Finglas West A, Finglas West B, Finglas West C, Glasnevin B, Inns Quay A.
The 1974 Act delineated the constituency's limits as comprising the following wards of the county borough of Dublin: Drumcondra South C, Finglas East A, Finglas East B, Finglas East D, Finglas East E, Finglas East F, Finglas West A, Finglas West B, Finglas West C, Glasnevin B, Inns Quay A.