A subsequent series of reforms of local government has resulted in the responsibility today being held by the relevant county council, unitary authority, metropolitan district, or London borough.
Each district is divided into sub-districts, each of which has a registrar responsible for the registration of births, marriages, civil partnerships, and deaths in his or her area.
Many of the SRDs share the name of the Irish county in which most of their land exists: Specifically, the SRDs of Londonderry, Donegal, Antrim, Sligo, Monaghan, Armagh, Cavan, Longford, Roscommon, Galway, Kilkenny, Carlow, Limerick, Tipperary, Wexford, Waterford, and Cork.
However, the SRDs follow the general outlines of Poor Law Unions that preceded them (see accompanying map), and often overlap across two or more counties.
Some Registration District lists and maps indicate a new SRD called Fingal for part of Dublin.