When the Irish Railway Record Society was formed in 1946, Ireland was served by a railway network owned and operated by ten separate private companies. Over the last 70 years there have been many changes to the railway system on both sides of the border. Through line closures, route mileage fell from over 2,800 in 1946 to under 1,500 now.
The factsheets (PDF files) below provide a brief synopsis of each Irish railway company to exist post-1946:
Further information on these and other Irish railways can be found in the IRRS Journal.