Greencastle has a population of 817, making it the 387th largest place we list in Ireland. It is in Ulster.
Greencastle holds under a tenth of one per cent of Ireland's 5,356,950 people. Dublin, the largest place we list there, is 1253 times its size.
817
population
#387
in Ireland
The population, measured on the census's boundary
| What you mean | Population | Source |
|---|---|---|
| Greencastle the CSO Built Up Area: the continuously built-up town | 1,268 | Census 2022 |
| Greencastle (GeoNames record) the figure in this page's heading; boundary unstated | 817 | GeoNames |
The census figure is the CSO's Census 2022 count for the Built Up Area, the boundary the CSO itself reports town populations on (data: CSO and Tailte Éireann, CC BY 4.0). Where the rows disagree, quote the census.
Greencastle is in Ulster, which has 49 recorded places.
Nearby in size
| Place | Region | Population |
|---|---|---|
| Belgooly | Munster | 826 |
| Strokestown | Connacht | 825 |
| Rosses Point | Connacht | 824 |
| Scarriff | Munster | 816 |
| Carraroe | Connacht | 814 |
| Kilsheelan | Munster | 812 |
All places in Ireland → · Ulster →
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.