Biggest and smallest places in Northern Ireland by population (2025)

Belfast was the most populated of Northern Ireland’s 11 councils in 2025 (population estimate 351,927).

Fermanagh and Omagh was the least populated (117,663). The middle council, Lisburn and Castlereagh, had 152,367.

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Population estimate for every council in Northern Ireland, highest first. Councils without a figure are listed last with the reason.
RankCouncilValue
1Belfast351,927
2Armagh City, Banbridge and Craigavon223,044
3Newry, Mourne and Down182,884
4Ards and North Down165,407
5Derry City and Strabane152,659
6Lisburn and Castlereagh152,367
7Mid Ulster152,292
8Antrim and Newtownabbey148,487
9Causeway Coast and Glens141,752
10Mid and East Antrim139,964
11Fermanagh and Omagh117,663

Source and method · See it on the map