Northern Ireland Output Areas

Output Areas (OAs) were introduced in Northern Ireland after the 2001 Census. Output Areas were built from clusters of adjacent postcodes. Output Areas themselves nest within the 582 Electoral Wards in Northern Ireland and were designed to have similar population sizes of around 125 households and 350 people, they are also as socially similar as possible. Output Areas in Northern Ireland are based on postcodes as of January 2000. There are 5022 OAs in Northern Ireland.

Output Areas (OAs) do not nest within the new 11 Local Government Districts (LGD2014) but a best-fit lookup table has been created. Technical guidance document and look-up tables are available.

Output Areas
Output Areas

Variable Description
X_Popcoord* Geographic coordinate easting for population weighted centroid 
Y_Popcoord* Geographic coordinate northing for population weighted centroid  
Hectares Area in hectares
X_Coord Geographic coordinate easting for geographically weighted centroid
Y_Coord Geographic coordinate northing for geographically weighted centroid
OA_Code Output Area coding convention

Output Area Boundaries in GIS format


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