List of Irish counties by population

This is a list of counties of Ireland ordered by population.

Counties in the Republic of Ireland are shown in normal type, while those in Northern Ireland are listed in italic type.

Non-traditional administrative counties are indicated by a cream-coloured background.

For a more detailed analysis of current and historical Irish populations in the Republic of Ireland, see Irish population analysis.

The population of the six counties of Northern Ireland as of 2021 is 1,903,100[1] which would mean a total population on the island of Ireland as of 2022 of approximately 7,052,314.