Newcastle has a population of 924, making it the 366th largest place we list in Ireland. It is in Leinster.
Newcastle holds under a tenth of one per cent of Ireland's 5,356,950 people. Dublin, the largest place we list there, is 1108 times its size.
924
population
#366
in Ireland
The population, measured on the census's boundary
| What you mean | Population | Source |
|---|---|---|
| Newcastle the CSO Built Up Area: the continuously built-up town | 1,010 | Census 2022 |
| Newcastle (GeoNames record) the figure in this page's heading; boundary unstated | 924 | 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.
Newcastle is in Leinster, which has 256 recorded places.
Nearby in size
| Place | Region | Population |
|---|---|---|
| Kilcormac | Leinster | 935 |
| Quin | Munster | 935 |
| Drumlish | Leinster | 931 |
| Ballinamore | Connacht | 914 |
| Drumshanbo | Connacht | 902 |
| Killeagh | Munster | 899 |
All places in Ireland → · Leinster →
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.