Castletroy has a population of 14,733, making it the 42nd largest place we list in Ireland. It is in Munster.
Castletroy holds 0.28% of Ireland's 5,356,950 people. Dublin, the largest place we list there, is 70 times its size.
14,733
population
#42
in Ireland
Castletroy is in Munster, which has 167 recorded places.
Nearby in size
| Place | Region | Population |
|---|---|---|
| Leixlip | Leinster | 15,504 |
| Lucan | Leinster | 15,269 |
| Kilquade | Leinster | 14,886 |
| Knocklyon | Leinster | 14,628 |
| Clondalkin | Leinster | 14,508 |
| Killarney | Munster | 14,504 |
All places in Ireland → · Munster →
Figures are the latest available in GeoNames (CC BY 4.0), which draws on national censuses of varying dates — treat them as recent, not same-year. Country totals are UN World Population Prospects 2024 (medium variant) where the UN lists the country separately; the handful it reports under a parent state keep a GeoNames figure and are marked as such. Sources & method.