List of tunnels in the United Kingdom Northern Ireland Northern Ireland

| County | Tunnel | Type_ | Length_Imperial | Date_of_opening |
|---|---|---|---|---|
| Londonderry | Castlerock | Rail | 668 yd | 1845 - 1853 |
| Londonderry | Downhill | Rail | 307 yd | 1845 - 1846 |
| Armagh | Lissummon | Rail | 1759 yd | early 1860s |
| Down | Binnian Tunnel | Aqueduct | 2.5 miles | 1948 - 1952 |
| Antrim | Whitehead | Rail | 145 yd | 1862 - 1994 |
| Tyrone | Dungannon | Rail | 800 yd | 1862 |