Castlefin has a population of 787, making it the 396th largest place we list in Ireland. It is in Ulster.
Castlefin holds under a tenth of one per cent of Ireland's 5,356,950 people. Dublin, the largest place we list there, is 1301 times its size.
787
population
#396
in Ireland
The population, measured on the census's boundary
| What you mean | Population | Source |
|---|---|---|
| Castlefinn the CSO Built Up Area: the continuously built-up town | 730 | Census 2022 |
| Castlefin (GeoNames record) the figure in this page's heading; boundary unstated | 787 | 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.
Castlefin is in Ulster, which has 49 recorded places.
Nearby in size
| Place | Region | Population |
|---|---|---|
| Glenties | Ulster | 805 |
| Rathmore | Munster | 790 |
| Cill Fhíonáin | Munster | 789 |
| Bruff | Munster | 783 |
| Doneraile | Munster | 780 |
| Kilfinnane | Munster | 778 |
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.