Steam locomotives of Ireland Belfast and Northern Counties Railway (1848–1903)  &  Northern Counties Committee (1903–1949) Belfast and Northern Counties Railway (1848–1903)  &  Northern Counties Committee (1903–1949)

| Class_ | Type_ | Fleet_numbers | Quantity_made | Manufacturer | Date_made | Date_withdrawn |
|---|---|---|---|---|---|---|
| A | 4-4-0 | 3–5, 9, 17, 20, 34, 63–68 | 13 | York Road Works (7) Derby Works (6) | 1901–1908 | 1929–1936 |
| B | 4-4-0 | 24, 59–62 | 5 | Beyer, Peacock & Co. | 1897–1898 | 1924–1932 |
| C | 2-4-0 | 21, 33, 50–52, 56–57 | 7 | Beyer, Peacock & Co. | 1890–1895 | 1926–1942 |
| D | 2-4-0 | 50, 55 | 2 | Beyer, Peacock & Co. | 1895 | 1944–1946 |
| E | 0-6-0 | 53–54 | 2 | Beyer, Peacock & Co. | 1892 | 1934–1944 |
| F | 2-4-0 | 45–46, 23 | 3 | Beyer, Peacock & Co. | 1880–1885 | 1938–1942 |
| G | 2-4-0 | 6, 8, 10–11, 22, 27, 29, 40–41 | 9 | Sharp, Stewart & Co. (7) Beyer, Peacock & Co. (2) | 1872–1878 | 1925–1933 |