| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Gahagan's Village | city | Offaly | Ireland | 53.29 | -7.91 | 193 | 1306 |
| Gahagan’s Village | city | Offaly | Ireland | 53.29 | -7.91 | 193 | 1306 |
| Gallros | city | Offaly | Ireland | 53.22 | -7.91 | 242 | 1579 |
| Galros | city | Offaly | Ireland | 53.22 | -7.91 | 242 | 1579 |
| Galros Cross Roads | city | Offaly | Ireland | 53.16 | -7.88 | 229 | 1810 |
| Garr | city | Offaly | Ireland | 53.39 | -7.21 | 830 | 1433 |
| Geashill | city | Offaly | Ireland | 53.24 | -7.32 | 275 | 2071 |
| Geisill | city | Offaly | Ireland | 53.24 | -7.32 | 275 | 2071 |
| Glasdair | city | Offaly | Ireland | 53.14 | -7.99 | 193 | 2522 |
| Glasdair Mhic Uallacháin | city | Offaly | Ireland | 53.14 | -7.97 | 203 | 2177 |
| Glasshouse | city | Offaly | Ireland | 53.24 | -7.62 | 249 | 1712 |
| Glaster | city | Offaly | Ireland | 53.14 | -7.99 | 193 | 2522 |
| Gleann Leitreach | city | Offaly | Ireland | 53.10 | -7.65 | 987 | 742 |
| Glenletter | city | Offaly | Ireland | 53.10 | -7.65 | 987 | 742 |
| Goldsmithslot | city | Offaly | Ireland | 53.29 | -7.66 | 229 | 1755 |
| Gort an Chraoibhín | city | Offaly | Ireland | 53.17 | -8.02 | 187 | 2130 |
| Gortarevan | city | Offaly | Ireland | 53.17 | -8.02 | 187 | 2130 |
| Gorteen Bridge | city | Offaly | Ireland | 53.20 | -7.49 | 341 | 2682 |
| Gorteenkeel | city | Offaly | Ireland | 53.26 | -7.27 | 278 | 1744 |
| Grogan | city | Offaly | Ireland | 53.32 | -7.70 | 226 | 1912 |