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 |
|---|---|---|---|---|---|---|
| H | 2-4-0 | 12–17 | 6 | Sharp, Stewart & Co. | 1856 | 1908–1924 |
| I | 2-4-0 | 40–41 | 2 | Beyer, Peacock & Co. | 1868 | 1924 |
| J | 2-4-0T | 25, 47–49 | 4 | Beyer, Peacock & Co. | 1883 | 1932–1934 |
| K | 0-6-0 | 7, 28, 30–32, 38–39, 43–44 | 9 | Sharp, Stewart & Co. (7) Beyer, Peacock & Co. (2) | 1867–1880 | 1925–1947 |
| L | 0-6-0 | 18–19, 35 | 3 | Sharp, Stewart & Co. | 1857–1861 | 1925–1933 |
| L1 | 0-6-0 | 36–37 | 2 | Beyer, Peacock & Co. | 1863 | 1928–1932 |
| M | 0-4-2 | 26 | 1 | York Road Works | 1873 | 1925 |
| N | 0-4-0ST | 42 | 1 | Sharp, Stewart & Co. | 1875 | 1925 |
| O | 0-4-2ST | 60–62 | 3 | Black, Hawthorn & Co | 1874–1875 | 1911–1923 |