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
Cavan from Portadown to Glaslough in 1957, it was found to be uneconomical to keep running the rump section from Monaghan to Cavan. All these lines (including the Cavan and Leitrim Railway) were closed by 1960. The (GNR) Virginia Road Station, from 1863 to 1958 serviced the Drogheda and Navan extension route to Kells and Oldcastle. Cooperation between the Cavan and Westmeath county councils is striving to integrate this into the national and regional development plan. Cavan railway station opened on 8 July 1856, closed for passenger services on 14 October 1957, and finally closed altogether on 1 January 1960. Cavan's