| 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 1000 sq mi |
| Location | Roller Coasters | % | Population | RCMP | Area (sq mi) | Density |
|---|---|---|---|---|---|---|
| Down | 1 | 0.333333 | 531665 | 1.880884 | - | - |
| Tyrone | - | - | 177986 | - | - | - |
| Derry | - | - | 247132 | - | - | - |
| Armagh | - | - | 174792 | - | - | - |
| Fermanagh | - | - | 61170 | - | - | - |
| Antrim | 2 | 0.666667 | 618108 | 3.235680 | - | - |