| 3 | Extant Roller Coasters |
| 9 | Defunct Roller Coasters |
| 4 | Extant Amusement Parks |
| 1 | Defunct Amusement Park |
| 1.60 | Roller Coasters per million people (RCMP) |
| 0.55 | Roller Coasters per 1,000 sq mi |
| Location | Roller Coasters | % | Population | RCMP | Area (sq mi) | Density |
|---|---|---|---|---|---|---|
| Antrim | 2 | 66.7% | 618,108 | 3.24 | - | - |
| Armagh | - | - | 174,792 | - | - | - |
| Derry | - | - | 247,132 | - | - | - |
| Down | 1 | 33.3% | 531,665 | 1.88 | - | - |
| Fermanagh | - | - | 61,170 | - | - | - |
| Tyrone | - | - | 177,986 | - | - | - |