The 2011 Classification for Output Areas (2011 OAC) is a hierarchical geodemographic classification across the UK which identifies areas of the country with similar characteristics. The OAC is produced as a collaboration between the Office for National Statistics and University College London. The classification contains the following breakdown of Output Areas into different groups and sub-groups. **Attributes:** OA_SA: Output / Small Area code (2011 Version) SPRGRP: Supergroup code GRP: Group code SUPGRP: Subgroup code For sub-national level geodata packs at the individual Local Authority District (LAD), Local Enterprise Partnership (LEP) or Combined Authority (CA), please visit [https://data.cdrc.ac.uk/geodata-packs](https://data.cdrc.ac.uk/geodata-packs)