| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Reacaslagh | city | Ciarrai | Ireland | 52.0102778 | -10.1033333 | 393 | 1448 |
| Reacaslagh | city | Ciarrai | Ireland | 52.2791667 | -9.2811111 | 849 | 3325 |
| Reaghstown | city | County Louth | Ireland | 53.9108333 | -6.6158333 | 223 | 8573 |
| Reagrove | city | Corcaigh | Ireland | 51.735 | -8.3555556 | 173 | 2911 |
| Reanagowan Cross Roads | city | Ciarrai | Ireland | 52.3147222 | -9.5072222 | 564 | 2413 |
| Reananerree | city | | Ireland | 51.9 | -9.1666667 | 498 | 5215 |
| Reanascreena | city | Corcaigh | Ireland | 51.6347222 | -9.0555556 | 498 | 5243 |
| Rear Cross | city | Tiobraid Arann | Ireland | 52.6863889 | -8.2358333 | 757 | 3652 |
| Rearyvalley | city | Laois | Ireland | 53.1727778 | -7.475 | 406 | 2718 |
| Reask | city | County Offaly | Ireland | 53.2258333 | -7.98 | 180 | 2696 |
| Reavouler Bridge | city | Corcaigh | Ireland | 51.6522222 | -9.1555556 | 419 | 5243 |
| Red Bridges | city | County Donegal | Ireland | 54.6647222 | -8.1305556 | 154 | 1821 |
| Red Castle | city | | Ireland | 55.15 | -7.1166667 | 0 | 721 |
| Red Cross Roads | city | Corcaigh | Ireland | 51.6111111 | -9.3280556 | 206 | 5247 |
| Red Gate | city | County Offaly | Ireland | 53.2625 | -7.5052778 | 242 | 2659 |
| Red Hills | city | Cill Dara | Ireland | 53.18 | -6.9577778 | 498 | 7166 |
| Redbog | city | Cill Chainnigh | Ireland | 52.6391667 | -7.0466667 | 134 | 3319 |
| Redbrae | city | County Leitrim | Ireland | 54.4652778 | -8.3686111 | 3 | 653 |
| Redchair Cross Roads | city | County Limerick | Ireland | 52.2888889 | -8.4525 | 498 | 5270 |
| Redcross | city | Cill Mhantain | Ireland | 52.8858333 | -6.1458333 | 249 | 4538 |
| Reddy's Cross Roads | city | County Carlow | Ireland | 52.7091667 | -7.0219444 | 255 | 4017 |
| Reddyʼs Cross Roads | city | County Carlow | Ireland | 52.7091667 | -7.0219444 | 255 | 4017 |
| Redford | city | Cill Mhantain | Ireland | 53.1533333 | -6.0808333 | 65 | 2402 |
| Redforge | city | Corcaigh | Ireland | 51.9905556 | -7.9275 | 314 | 5064 |
| Redforge Cross Roads | city | Corcaigh | Ireland | 51.9905556 | -7.9275 | 314 | 5064 |
| Redgap | city | Baile Atha Cliath | Ireland | 53.2683333 | -6.4752778 | 882 | 76674 |
| Redgate | city | Corcaigh | Ireland | 52.1038889 | -8.9058333 | 836 | 5188 |
| Redgate | city | Loch Garman | Ireland | 52.4183333 | -6.5027778 | 39 | 4035 |
| Redgate Cross Roads | city | Port Lairge | Ireland | 52.1627778 | -7.7761111 | 351 | 4701 |
| Redgate Cross Roads | city | Laois | Ireland | 53.0783333 | -7.4375 | 505 | 2773 |
| Redhill | city | | Ireland | 53.9833333 | -8.4666667 | 249 | 2634 |
| Redhills | city | An Cabhan | Ireland | 54.1 | -7.3166667 | 249 | 2733 |
| Redwood | city | Tiobraid Arann | Ireland | 53.1225 | -8.1080556 | 236 | 2784 |
| Reen | city | Ciarrai | Ireland | 52.1177778 | -9.8 | 3 | 2015 |
| Reen | city | Ciarrai | Ireland | 51.8797222 | -9.6430556 | 141 | 2146 |
| Reenard | city | Ciarrai | Ireland | 51.9297222 | -10.26 | 29 | 1509 |
| Reenard Cross | city | Ciarrai | Ireland | 51.9347222 | -10.2411111 | 239 | 2015 |
| Reenconnell | city | Ciarrai | Ireland | 52.1847222 | -10.3158333 | 328 | 2164 |
| Reenroe | city | Ciarrai | Ireland | 51.8477778 | -10.2422222 | 6 | 1672 |
| Reenrone | city | Ciarrai | Ireland | 51.8019444 | -9.9836111 | 16 | 1779 |
| Reens | city | County Limerick | Ireland | 52.5077778 | -8.9994444 | 131 | 5475 |
| Reens Bridge | city | County Limerick | Ireland | 52.4905556 | -9.033333 | 190 | 5481 |
| Reevanagh | city | Cill Chainnigh | Ireland | 52.7294444 | -7.1269444 | 816 | 3334 |
| Reeves | city | Cill Dara | Ireland | 53.3127778 | -6.5577778 | 190 | 20178 |
| Regalnka Bridge | city | An Clar | Ireland | 52.8941667 | -9.2036111 | 206 | 2507 |
| Relagh | city | An Cabhan | Ireland | 53.8705556 | -6.9597222 | 505 | 2724 |
| Relaghbeg | city | An Cabhan | Ireland | 53.8705556 | -6.9597222 | 505 | 2724 |
| Releagh | city | Corcaigh | Ireland | 51.7833333 | -9.5666667 | 593 | 3939 |
| Releagh Bridge | city | Ciarrai | Ireland | 51.8197222 | -9.5641667 | 446 | 3120 |
| Renaghmore | city | Tiobraid Arann | Ireland | 52.65 | -7.5366667 | 515 | 3041 |
| Rerrin | city | Corcaigh | Ireland | 51.6394444 | -9.8175 | 3 | 2386 |
| Reynold's Town | city | County Louth | Ireland | 53.8091667 | -6.2705556 | 3 | 6949 |
| Reynoldʼs Town | city | County Louth | Ireland | 53.8091667 | -6.2705556 | 3 | 6949 |
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