Great Southern Railways Company

The Great Southern Railways Company (often Great Southern Railways, or GSR) was an Irish company that from 1925 until 1945 owned and operated all railways that lay wholly within the Republic of Ireland.

The Great Southern and Western Railway Company, the Midland Great Western Railway Company of Ireland and the Cork, Bandon and South Coast Railway Company initially forming the Great Southern Railway Company. The Great Southern Railways Company was formed when the fourth major company, the Dublin and South Eastern Railway (DSER), joined these companies. The DSER was substantially British-owned and had wished to merge with the GNR but was overruled.