The population of Castlebar, Ireland in April 2026. How many residents now in Castlebar?

Ireland / Castlebar

The estimated population of Castlebar as of April 2026 is around 11,891 residents. Please note: this population number is an estimate and may slightly change as people get born and die, it also depends on migration to/from Castlebar.

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Check out more data on population in Ireland:

Midleton
Wicklow
Mallow
Ballina
Cobh
Arklow
Tullamore

This population of Castlebar is provided by the local bureau of statistics.
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