Image | Company | Number / Name | Class | Type | Manufacturer | Serial No. | Date | Notes |
5 ft 3 in (1,600 mm) |
| Belfast and County Down Railway | 30 | 30 | 4-4-2T | Beyer, Peacock & Company | 4231 | 1901 | Static display, Ulster Transport Museum, Cultra, Belfast |
| Northern Counties Committee (LMS) | 74 Dunluce Castle | U2 | 4-4-0 | North British Locomotive Company | 23096 | 1924 | Static display, Ulster Transport Museum, Cultra, Belfast |
| Northern Counties Committee (LMS) | 4 | WT | 2-6-4T | Derby Works | — | 1947 | Railway Preservation Society of Ireland, Whitehead, Co. Antrim |
| Great Northern Railway | 93 Sutton | JT | 2-4-2T | Dundalk Works | — | 1895 | Static display, Ulster Transport Museum, Cultra, Belfast |
| Great Northern Railway | 131 Uranus | Q | 4-4-0 | Neilson, Reid & Company | 5757 | 1901 | Railway Preservation Society of Ireland, Whitehead, Co. Antrim |
| Great Northern Railway | 171 Slieve Gullion | S | 4-4-0 | Beyer, Peacock & Company | 5629 | 1913 | Railway Preservation Society of Ireland, Whitehead, Co. Antrim |
| Great Northern Railway | 85 Merlin | V | 4-4-0 | Beyer, Peacock & Company | 6733 | 1932 | Railway Preservation Society of Ireland, Whitehead, Co. Antrim (run by) Ulster Transport Museum, Cultra, Belfast (owned) |
| Sligo, Leitrim and Northern Counties Railway | Lough Erne | Lough | 0-6-4T | Beyer, Peacock & Company | 7242 | 1949 | Railway Preservation Society of Ireland, Whitehead, Co. Antrim |
| Dublin and South Eastern Railway | 15 → GSR 461 | 15–16 | 2-6-0 | Beyer, Peacock & Company | 6112 | 1922 | Railway Preservation Society of Ireland, Whitehead, Co. Antrim |
| Great Southern & Western Railway | 36 | 21 | 2-2-2 | Bury, Curtis and Kennedy | — | 1847 | Static display, Cork Kent railway station |
| Great Southern & Western Railway | 90 | 90 | 0-6-0T | Inchicore Works | — | 1875 | Downpatrick and County Down Railway |
| Great Southern & Western Railway | 184 | 101 | 0-6-0 | Inchicore Works | — | 1880 | Railway Preservation Society of Ireland, Whitehead, Co. Antrim |
| Great Southern & Western Railway | 186 | 101 | 0-6-0 | Sharp, Stewart & Company | 2838 | 1879 | Railway Preservation Society of Ireland, Whitehead, Co. Antrim |
| Great Southern Railways | 800 Maeḋḃ | 800 | 4-6-0 | Inchicore Works | — | 1939 | Static display, Ulster Transport Museum, Cultra, Belfast |
| Londonderry Port and Harbour Commissioners | 1 | — | 0-6-0ST | Robert Stephenson & Company | 2738 | 1891 | Static display, Ulster Transport Museum, Cultra, Belfast |
| Londonderry Port and Harbour Commissioners | 3 R.H. Smyth | — | 0-6-0ST | Avonside Engine Company | 2021 | 1928 | Railway Preservation Society of Ireland, Whitehead, Co. Antrim |
| Cómhlucht Siúicre Éireann | 1 | CSÉT Shunting Locomotives | 0-4-0T | Orenstein & Koppel | 12475 | 1934 | Downpatrick and County Down Railway |
| Cómhlucht Siúicre Éireann | 3 | CSÉT Shunting Locomotives | 0-4-0T | Orenstein & Koppel | 12662 | 1935 | Downpatrick and County Down Railway |
| Guinness Brewery | 3 | — | 0-4-0ST | Hudswell Clarke | 1152 | 1919 | Railway Preservation Society of Ireland, Whitehead, Co. Antrim[1] |
3 ft (914 mm) gauge |
| County Donegal Railways Joint Committee | 16 Donegal → 4 Meenglas | 5 | 2-6-4T | Nasmyth, Wilson & Company | 828 | 1907 | Foyle Valley Railway |
| County Donegal Railways Joint Committee | 17 Glenties → 5 Drumboe | 5 | 2-6-4T | Nasmyth, Wilson & Company | 829 | 1907 | Donegal Railway Heritage Centre |
| County Donegal Railways Joint Committee | 18 Killybegs → 6 Columbkille | 5 | 2-6-4T | Nasmyth, Wilson & Company | 830 | 1907 | Foyle Valley Railway |
| County Donegal Railways Joint Committee | 2A Strabane → 2 Blanche | 5A | 2-6-4T | Nasmyth, Wilson & Company | 956 | 1912 | Static display, Ulster Transport Museum, Cultra, Belfast |
| Cavan and Leitrim Railway | 2 Kathleen | 1–8 | 4-4-0T | Robert Stephenson & Company | 2613 | 1887 | Static display, Ulster Transport Museum, Cultra, Belfast |
| Cavan and Leitrim Railway | 3 Lady Edith | 1–8 | 4-4-0T | Robert Stephenson & Company | 2614 | 1887 | New Jersey Museum of Transportation in process of returning to Ireland. |
| Tralee and Dingle Light Railway | 5 | 5 | 2-6-2T | Hunslet Engine Company | 555 | 1892 | Cavan and Leitrim Railway |
| West Clare Railway | 5 Slieve Callan | 5–7 | 0-6-2T | Dübs & Company | 2890 | 1892 | West Clare Railway |
| Portstewart Tramway | 1 | 1–2 | 0-4-0T | Kitson & Company | T56 | 1882 | Preserved at the Streetlife Museum of Transport in Hull. |
| Portstewart Tramway | 2 | 1–2 | 0-4-0T | Kitson & Company | T84 | 1883 | Static display, Ulster Transport Museum, Cultra, Belfast. |
| British Aluminium | 1 Tyrone | | 0-4-0T | Peckett & Sons | 1026 | 1904 | Giant's Causeway and Bushmills Railway |
| British Aluminium | 2 | | 0-4-0T | Peckett & Sons | 1097 | 1906 | Static display, Ulster Transport Museum, Cultra, Belfast |
| Bord na Móna | 2 → LM44 | 1–3 | 0-4-0WT | Andrew Barclay Sons & Company | 2264 | 1949 | Stradbally Woodland Railway |
| Bord na Móna | 3 Shane → LM45 | 1–3 | 0-4-0WT | Andrew Barclay Sons & Company | 2265 | 1949 | Giant's Causeway and Bushmills Railway |
1 ft 10 in (559 mm) gauge |
| Guinness Brewery | 13 | | 0-4-0T | William Spence and Son | — | 1895 | Static display, Narrow Gauge Railway Museum, Tywyn, Wales |
| Guinness Brewery | 15 | | 0-4-0T | William Spence and Son | — | 1895 | Stradbally Woodland Railway |
| Guinness Brewery | 17 | | 0-4-0T | William Spence and Son | — | 1902 | Guinness Brewery, Dublin. |
| Guinness Brewery | 20 | | 0-4-0T | William Spence and Son | — | 1905 | Static display at Ulster Transport Museum, Cultra, Belfast |
| Guinness Brewery | 22 | | 0-4-0T | William Spence and Son | — | 1912 | Cavan and Leitrim Railway |
| Guinness Brewery | 23 | | 0-4-0T | William Spence and Son | — | 1921 | Static display, Amberley Museum & Heritage Centre, Amberley, West Sussex. |