Counties of Ireland or between the three counties in the Dublin area. This system usually results in more populated counties having several constituencies: Dublin, including Dublin city, is subdivided into twelve constituencies, Cork into five. On the other hand, smaller counties such as Carlow and Kilkenny or Laois and Offaly may be paired to form constituencies. An extreme case is the splitting of Ireland's least populated county of Leitrim between the constituencies of Sligo–North Leitrim and Roscommon–South Leitrim. Each county or city is divided into Local electoral areas for the election of councillors. The boundaries of the areas and the number of councillors
Books of Survey and Distribution include: "Proprietors in 1641 by the Civil Survey", "Denominations of lands by the Downe Survey", "Number of acres distributed", "persons to whom distributed" and "Rent per annum payable to His Majesty". The surviving Survey and Distribution volumes cover the following counties: Kilkenny, Waterford, Kerry, Kildare, Carlow, Wexford, Longford, Mayo, Tipperary, Monaghan, Armagh, Limerick, Westmeath, Clare, Roscommon, Galway, Cork, Down, Antrim, Leitrim, Sligo, Cavan, Fermanagh, Laois, Offaly, Wicklow, Donegal, Londonderry and Tyrone. The Books for Clare, Galway, Mayo and Roscommon have been published by the Irish Manuscripts Commission. For other counties, manuscript copies are available at the National Library.Those for co