| Abbeydorney to Listowel | GS&WR | 10-Jan-1977 | 1977.008 | ||
| Armagh to Keady | GNRI | 01-Oct-1957 | 1957.023 | ||
| Athy to Ballylinan | 01-Apr-1963 | 1963.034 | |||
| Attymon Jn to Loughrea | MGWR | 02-Oct-1975 | 1975.027 | Retained for possible preservation scheme until ? | |
| Ballina to Killala | MGWR | 01-Jul-1934 | 1934.006 | ||
| Ballinamore to Arigna Mine | Cavan & Leitrim | 01-Apr-1959 | 1959.029 | 914mm gauge. | |
| Ballinascarthy to Courtmacsherry | CBSCR | 01-Apr-1961 | 1961.019 | ||
| Ballybay, SHANTONA JN to Cootehill | GNRI | 01-Jan-1960 | 1960.004 | ||
| Ballyclare Jn, KINGSBOG JN to Ballyclare | MR(NCC) | 02-May-1938 | 1938.006 | RO 1940. Closed again 3-Jul-1950 (see ...). | |
| Ballyclare Jn, KINGSBOG JN to Ballyclare | MR(NCC) | 03-Jul-1950 | 1950.021 | ||
| Ballyclare to Doagh | MR(NCC) | in year ending | 31-Dec-1933 | 1933.004 | narrow gauge. |
| Ballyclare to Larne Harbour | MR(NCC) | 03-Jul-1950 | 1950.019 | 914mm gauge. | |
| Ballyhaise to Clones | GNRI | 01-Jan-1960 | 1960.007 | ||
| Ballymena to Ballyboley Jn | MR(NCC) | 02-Jun-1940 | 1940.009 | 914mm? gauge. | |
| Ballymena to Rathkenny, Creamery Siding | MR(NCC) | 02-Jun-1940 | 1940.010 | 914mm? gauge. | |
| Ballymoney to Ballycastle | Ballycastle | temp closure | 24-Mar-1924 | 1924.003 | 914mm gauge. Ballycastle Railway. Closure due to bankruptcy. RO 11-Aug-1924 ?by LMSR(NCC)? |
| Ballymoney to Ballycastle | LMSR(NCC) | 03-Jul-1950 | 1950.020 | 914mm gauge. | |
| Ballynahinch Jn to Ballynahinch | BCDR | 15-Jan-1950 | 1950.005 | ||
| BALLYPHEHANE JN to Cork, Capwell | C&MDR | in year ending | 31-Dec-1925 | 1925.002 | |
| Banteer Junction to Newmarket | 04-Feb-1963 | 1963.019 | |||
| BELFAST CENTRAL JN to BALLYMACARRETT JN | BCR | 02-Aug-1965 | 1965.189 | Date is when line was cut by removal of bridge over Middlepath Street. RO 12-Apr-1976. | |
| Belfast, BALLYMACARRETT JN to Donaghadee | BCDR | 24-Apr-1950 | 1950.012 | ||
| Belfast, Queens Bridge to Belfast, York Road | BHC | 01-Jun-1963 | 1963.052 | ||
| Belturbet to Ballyhaise | GNRI | 01-Apr-1959 | 1959.030 | ||
| Belturbet to Dromod | Cavan & Leitrim | 01-Apr-1959 | 1959.028 | 914mm gauge. | |
| Birdhill to Killaloe | GS&WR | 24-Apr-1944 | 1944.003 | ||
| Blessington to Poulaphouca | note | 30-Sep-1927 | 1927.007 | Dublin and Blessington Railway. | |
| Buncrana to Carndonagh | L&LSR | 02-Dec-1935 | 1935.024 | 914mm? gauge. | |
| Bundoran Jn to Bundoran | GNRI | 01-Oct-1957 | 1957.026 | ||
| Carrickfergus to Carrickfergus Harbour | MR(NCC) | in year ending | 31-Dec-1957 | 1957.001 | O 1960. |
| Castlederg to Victoria Bridge | C&VBR | 17-Apr-1933 | 1933.012 | narrow gauge. | |
| Castlegregory Jn to Castlegregory | T&DR | 17-Apr-1939 | 1939.009 | 914mm? gauge. | |
| Cavan to Ballyhaise | MGWR | 01-Jan-1960 | 1960.006 | ||
| Clara to Banagher | 01-Jan-1963 | 1963.003 | |||
| Clara to Streamstown | regular traffic ceased | 25-Jan-1947 | 1947.003 | Last excursion ran 18-Mar-1963. Abandoned 1965. TR 12.1966. | |
| Claremorris to Ballinrobe | MGWR | 01-Jan-1960 | 1960.010 | ||
| Claremorris to Collooney | GS&WR | 03-Nov-1975 | 1975.033 | ||
| CLONAKILTY JN to Clonakilty | CBSCR | 01-Apr-1961 | 1961.018 | ||
| Clones to Dundalk | GNRI | 01-Jan-1960 | 1960.005 | ||
| Clones to Omagh | GNRI | 01-Oct-1957 | 1957.025 | ||
| Clonsilla to NAVAN JN | MGWR | 01-Apr-1963 | 1963.036 | ||
| Coachford Junction to Coachford | C&MLR | 31-Dec-1934 | 1934.013 | 914mm gauge. | |
| Coalisland to Cookstown | GNRI | 05-Oct-1959 | 1959.069 | ||
| Coleraine to Coleraine Harbour | MR(NCC) | 30-Sep-1966 | 1966.180 | RTC 10.1963. | |
| Coleraine to Coleraine Harbour | MR(NCC) | 30-Sep-1966 | 1966.182 | RTC 4.1963. | |
| Coleraine, JN with 1924 deviation to JN with Harbour branch | MR(NCC) | 21-Mar-1924 | 1924.002 | Replaced by new line further ?south. | |
| Coleraine, JN with Waterside branch to Coleraine, Waterside | BNCR? | in month ending | 31-May-1861 | 1861.002 | |
| Collooney to Enniskillen | SL&NCR | 01-Oct-1957 | 1957.027 | ||
| Comber to Newcastle | BCDR | 15-Jan-1950 | 1950.004 | ||
| Cookstown Jn to Kilrea | MR(NCC) | 01-Oct-1959 | 1959.064 | Date may be 5-Oct-1959. | |
| Cork Albert Quay to Bantry | CBSCR | 01-Apr-1961 | 1961.016 | ||
| Cork, Albert Street to Monkstown | CB&PR | 10-Sep-1932 | 1932.008 | ||
| Cork, BALLYPHEHANE JN to Macroom | C&MDR | 01-Jan-1954 | 1954.002 | ||
| Cork, Western Road to Donoughmore | C&MLR | 31-Dec-1934 | 1934.011 | 914mm gauge. | |
| Crossdoney to Killashandra | MGWR | 27-Jan-1947 | 1947.005 | ||
| Crumlin, GORTNAGALLON JN to Gortnagallon | GNRI | regular traffic ceased | 07-Oct-1945 | 1945.003 | T 11-Apr-1948. TR ca 1950. |
| CURRAGH to Curragh Racecourse Platform | GS&WR | 07-Mar-1977 | 1977.014 | ||
| Donegal to Ballyshannon | Co.Donegal Jt | 31-Dec-1959 | 1959.084 | 914mm gauge. | |
| Downpatrick Loop Platform to Downpatrick | BCDR | 15-Jan-1950 | 1950.006 | ||
| Drimoleague to Baltimore | CBSCR | 01-Apr-1961 | 1961.017 | ||
| Dromin to Ardee | GNRI | 03-Nov-1976 | 1976.030 | ||
| Dublin, Terenure to Blessington | D&B | 31-Dec-1932 | 1932.012 | ||
| Dun Laoghaire, (PIER JN) to Carlisle Pier | DSER | 11-Oct-1980 | 1980.040 | ||
| Dundalk to Greenore | DN&GR | 31-Dec-1951 | 1951.060 | ||
| Enfield to Edenderry | MGWR | 01-Apr-1963 | 1963.035 | ||
| Ennis to Kilrush | West Clare | 01-Feb-1961 | 1961.006 | 914mm gauge. | |
| Farranfore to Valentia Harbour | GS&WR | 01-Feb-1960 | 1960.019 | ||
| FELTHOUSE JN to KILLINICK JN | DSER? | in year ending | 31-Dec-1912 | 1912.002 | |
| Fermoy to Mitchelstown | GS&WR | 27-Jan-1947 | 1947.006 | ||
| GALWAY to Clifden | MGWR | 29-Apr-1935 | 1935.007 | ||
| Glynn to Larne Harbour | MR(NCC) | 23-Jun-1974 | 1974.011 | Replaced by new line further inland opened same date? | |
| Goolds Cross to Cashel | GS&WR | in month ending | 30-Sep-1954 | 1954.026 | |
| Goraghwood to Markethill | GNRI | 01-May-1955 | 1955.017 | ||
| Goraghwood to Warrenpoint | GNRI | 04-Jan-1965 | 1965.004 | ||
| Gortatlea to Castleisland | GS&WR | 10-Jan-1977 | 1977.007 | ||
| Greenisland to Monkstown | MR(NCC) | severed | 11-Aug-1985 | 1985.020 | RTC |
| Gweedore to Burtonport | L&LSR | 01-Jun-1940 | 1940.008 | 914mm? gauge. | |
| Headford Jn to Kenmare | GS&WR | 01-Jan-1960 | 1960.011 | ||
| Inniskeen to Carrickmacross | GNRI | 01-Jan-1960 | 1960.008 | ||
| Inny Jn to Cavan | MGWR | 01-Jan-1960 | 1960.003 | ||
| Keady to Castleblaney | GNRI | 10-Aug-1924 | 1924.005 | ||
| Kilfree Junction to Ballaghadereen | 04-Feb-1963 | 1963.018 | |||
| Kilmessan to Athboy | MGWR | 01-Jan-1954 | 1954.003 | ||
| Kilrea to Macfin | MR(NCC) | 28-Aug-1950 | 1950.026 | ||
| Kinsale Junction to Kinsale | CBSCR | 01-Sep-1931 | 1931.012 | ||
| Knockmore Jn, Newforge Siding to Banbridge | GNRI | 29-Apr-1956 | 1956.015 | ||
| Letterkenny to Gweedore | L&LSR | 01-Jun-1947 | 1947.010 | 914mm gauge. | |
| Limavady Jn to Limavady | MR(NCC) | 02-May-1955 | 1955.018 | ||
| Limavady to Dungiven | MR(NCC) | 03-Jul-1950 | 1950.023 | ||
| Limerick to CAREY'S ROAD | GS&WR | 02-Oct-1975 | 1975.026 | ||
| Listowel to Ballybunion | note | 14-Oct-1924 | 1924.006 | Listowel and Ballybunion Railway (monorail). | |
| Listowel to Newcastle West | GS&WR | 03-Nov-1975 | 1975.034 | ||
| Londonderry, Graving Dock to Buncrana | L&LSR | 10-Aug-1953 | 1953.029 | 914mm gauge. | |
| Londonderry, Waterside to Londonderry, Foyle Road | LHC | regular traffic ceased | 31-Aug-1962 | 1962.052 | Line over river bridge (via turnplates). TR 1967. |
| Macmine Junction to New Ross* | DSER? | 01-Apr-1963 | 1963.039 | Used by special train in connection with hurling match 1-Sep-1963. | |
| Magherafelt to Cookstown | MR(NCC) | 01-May-1955 | 1955.014 | ||
| Magherafelt to Draperstown | MR(NCC) | 03-Jul-1950 | 1950.024 | ||
| Magilligan to Magillan Point | in month ending | 31-Oct-1885 | 1885.002 | 1435mm gauge. | |
| Maguiresbridge to Tynan | CVR | 31-Dec-1941 | 1941.010 | ||
| Markethill to Armagh | GNRI | in month ending | 28-Feb-1933 | 1933.005 | |
| Monaghan to Clones | GNRI | 01-Jan-1960 | 1960.009 | ||
| Monkstown to Crosshaven | CB&PR | 31-May-1932 | 1932.005 | ||
| Moyasta Jn to Kilkee | West Clare | 01-Feb-1961 | 1961.007 | ||
| Muinebeag to Palace East | 01-Apr-1963 | 1963.037 | |||
| NAVAN JN to Oldcastle | GNRI | 01-Apr-1963 | 1963.038 | Used by special train 30-Apr-1963. | |
| Newcastle to Castlewellan | BCDR | 01-May-1955 | 1955.015 | ||
| Newcastle West to Ballingrane Jn | GS&WR | 03-Nov-1975 | 1975.035 | ||
| Newry to Bessbrook | B&N | 10-Jan-1948 | 1948.003 | ? gauge. | |
| Newry to Greenore | DN&GR | 31-Dec-1951 | 1951.061 | ||
| Portadown to Monaghan | GNRI | 01-Oct-1957 | 1957.024 | ||
| Portarlington to Clonsast ESB Power Station | track removed | 31-Dec-1965 | 1965.264 | RTC 1959 60. Used by rail tours 16-Jul-1960 and 9-Jun-1964. | |
| PORTLAOISE SOUTH to Kilkenny* | 01-Jan-1963 | 1963.005 | |||
| Portlaoise, CONNIBERRY JN to Mountmellick | GS&WR | 01-Jan-1963 | 1963.001 | ||
| Portlaoise, Coolnamona Siding to JN with Bord na Mona lines | possibly | 01-Jan-1963 | 1963.004 | RO end 9.1965. | |
| Portrush to Portrush Harbour | MR(NCC) | official closure date | 03-Jul-1950 | 1950.022 | Actual date of closure 1949. |
| Portstewart Station to Portstewart Town | MR(NCC)? | 01-Feb-1926 | 1926.005 | Portstewart Tramway. | |
| Portstewart to Giants Causeway | Giants Causeway | 01-Oct-1949 | 1949.013 | ? gauge. | |
| Rathkenny, Creamery Siding to Retreat | MR(NCC) | 10-Apr-1937 | 1937.002 | 914mm? gauge. | |
| Rathluirc Junction to Patrickswell | 27-Mar-1967 | 1967.053 | |||
| Roscrea to Birr | 01-Jan-1963 | 1963.002 | |||
| Sallins to Tullow | GS&WR | 15-Mar-1959 | 1959.023 | ||
| Scarva to Castlewellan | GNRI | 01-May-1955 | 1955.016 | ||
| Schull to Skibbereen | S&SR | 27-Jan-1947 | 1947.007 | 914mm? gauge. | |
| SHANGANAGH JN to Dublin Harcourt Street | DSER | 01-Jan-1959 | 1959.006 | ||
| St Annes to Blarney | C&MLR | 31-Dec-1934 | 1934.012 | 914mm gauge. | |
| Strabane to Killybegs | Co.Donegal Jt | 31-Dec-1959 | 1959.083 | 914mm gauge. | |
| Strabane to Londonderry Victoria Road | MR(NCC) | 31-Dec-1954 | 1954.041 | 914mm gauge. | |
| Stranorlar to Glenties | Co.Donegal Jt | 31-Dec-1947 | 1947.018 | 914mm gauge. | |
| Tooban Jn to Letterkenny | L&LSR | 10-Aug-1953 | 1953.030 | 914mm gauge. | |
| Tralee to Abbeydorney | GS&WR | 05-Jun-1978 | 1978.020 | ||
| Tralee to Dingle | T&D | 10-Mar-1947 | 1947.008 | 914mm gauge. Cattle specials continued until ? | |
| Tralee* to Fenit | GS&WR | 05-Jun-1978 | 1978.019 | ||
| Waterford Manor to Tramore | W&T | 31-Dec-1960 | 1960.100 | ||
| Waterford, GRACE DIEU JN g f to Ballinacourty | GS&WR/CIE | 28-Jul-1982 | 1982.028 | ||
| Waterford, GRACE DIEU JN* to MALLOW NORTH | 27-Mar-1967 | 1967.055 | GRACE DIEU JN to Ballinacorty?? RO | ||
| WATERFORD? to Wellington Bridge | F&RR | temp closure | 07-Mar-1991 | 1991.007 | TC due to damage to Barrow Bridge. RO 29-Jul-1991. |
| Westport to Achill | MGWR | 01-Oct-1937 | 1937.010 | ||
| Westport to Westport Quay | MGWR | in year ending | 31-Dec-1977 | 1977.005 | |
| Wicklow, WICKLOW JN g f to Wicklow, Murragh | DSER | 01-Nov-1976 | 1976.029 | ||
| WOODENBRIDGE JN to Shillelagh | DSER | 24-Apr-1944 | 1944.004 |