Northern Ireland Census 2021 - MS-B18: National identity (person based) (classification 1) - full detail

This dataset provides Census 2021 estimates that classify usual residents in Northern Ireland by national identity (person based). This dataset is mutually exclusive; respondents are included in one group only (for example, this classification includes a 'British only' group, 'Irish only' group, and 'British and Irish only' group).

The census collected information on the usually resident population of Northern Ireland on census day (21 March 2021). Initial contact letters or questionnaire packs were delivered to every household and communal establishment, and residents were asked to complete online or return the questionnaire with information as correct on census day. Special arrangements were made to enumerate special groups such as students, members of the Travellers Community, HM Forces personnel etc. The Census Coverage Survey (an independent doorstep survey) followed between 12 May and 29 June 2021 and was used to adjust the census counts for under-enumeration.

This table reports the categories for which there are 10 or more usual residents. Where there are fewer than 10 usual residents for any category, these have been reported in a residual group which may or may not contain 10 or more usual residents in total.

Mixed' indicates a respondent has written-in more than one national identity, the combination of which could not be coded to the existing framework. 'EU' is the European Union and is as defined on Census day (21 March 2021).

Quality assurance report can be found here