This is a list of settlements in Northern Ireland by population, based on data published by the Northern Ireland Statistics and Research Agency (NISRA), from the 2021 Census.

[1] NISRA's classification of settlements is as follows.

[2][3] Note that 'Large town' and 'medium town' includes Bangor, Lisburn, Newry and Armagh, which all have city status.

Settlements with city status are shown in bold.

Districts are local government districts as established in April 2015.