Deepest caves
| Rank | Cave Name | Length (km) | Vertical Range (m) | Region | Type | More Info |
|---|---|---|---|---|---|---|
| 1 | Poll na gCeim | < 1 | 181 | Co. Clare | All cave | Short description |
| 2 | Carrowmore Caverns | < 1 | 142 | Co. Sligo | All cave | |
| 3 | Poulnagollum - Poulelva | 16 | 140 | Co. Clare | All cave | Short description |
| 4 | Polliska | < 1 | 134 | Co. Sligo | All cave | Short description |
| 5 | Poulnagree | 5.2 | 130 | Co. Clare | All cave | |
| 6 | Deep Pot on Largy | < 1 | 112 | Co. Leitrim | All cave | |
| 7 | Pollatoomary (Pollflanagan) | < 1 | 103 | Co. Mayo | All cave | Short description |
| 8 | Ramsons Pot | < 1 | 100 | Co. Leitrim | All cave | |
| 9 | Faunarooska Cave | 1.69 | 94 | Co. Clare | All cave | |
| 10 | Dragonfly Pot | < 1 | 90 | Co. Sligo | All cave | |
| 11 | Poll na Gonzo | < 1 | 90 | Co. Clare | All cave | Short description |
| 12 | Pollnaleprechauns | < 1 | 84 | Co. Leitrim | All cave | |
| 13 | Cullaun Five | 5.934 | 83 | Co. Clare | All cave | |
| 14 | Pollindre (Pollnaindre) | 1 | 82 | Co. Galway | All cave | Short description |
| 15 | Pollballiny | 2.065 | 80 | Co. Clare | All cave | |
| 16 | Cullaun Three | 3.5 | 78 | Co. Clare | All cave | Short description |
| 17 | Poll Ballynahown | < 1 | 75 | Co. Clare | All cave | |
| 18 | Coolagh River Cave | 5.285 | 72 | Co. Clare | All cave | |
| 19 | Polltoophill - Polldeelin - Small Polldeelin (Poulnacapple) | 4 | 71 | Co. Galway | All cave | Short description |
| 20 | Cave of the Wild Horses | 1.285 | 70 | Co. Clare | All cave | Short description |
| 21 | Pollnatagha - Pollprughlisk - Polliniska | < 1 | 70 | Co. Cavan | All cave | Short description |
| 22 | Poulomega | < 1 | 70 | Co. Clare | All cave | |
| 23 | Pollballyelly | < 1 | 68 | Co. Clare | All cave | |
| 24 | Polticoghlan (Pulthy Clogher) | < 1 | 67 | Co. Leitrim | All cave | |
| 25 | Pollnagollum Slieve Rushen | < 1 | 65 | Co. Cavan | All cave | |
| 26 | Teampall Shetric (Teampol Shetric) | 1.09 | 64 | Co. Leitrim | All cave | |
| 27 | Pollrúnda | < 1 | 64 | Co. Leitrim | All cave | |
| 28 | An Duibheagán (Largy Rift II - 4) | < 1 | 61 | Co. Leitrim | All cave | |
| 29 | Barton's Hole | < 1 | 60 | Co. Sligo | Part mine | Short description |
| 30 | Poll Dearg | < 1 | 60 | Co. Clare | All cave |
If you don't see the cave you want, but you know it should be in the RO Ireland section, remember that this list only shows caves with at least 60 m depth of natural passage. Other caves may show up in the list of longest caves in RO Ireland.
However, if you are looking for a specific cave that does have at least 60 m depth of natural passage, and should be listed here, please let me know about it so I can update the database.