JSNA 2024 – Geographic areas

The JSNA includes data presented at a range of different geographical areas. The table below outlines and defines these.

Geographic Area	Definition
Output Area (OA)	The lowest level of geographical area for census statistics. They comprise between 40 – 250 households and have a resident population between 100 – 625 people.
Lower Super Output Area (LSOA)	They are made up of groups of usually 4-5 Output Areas. They comprise between 400 – 1,200 households and have a resident population between 1,000 – 3,000 people.
Middle Super Output Area (MSOA)	They are made up of groups of usually 4-5 LSOAs. They comprise between 2,000 – 6,000 households and have a usually resident population between 5,000 – 15,000 people
Ward	Wards are electoral districts at sub-national level represented by one or more councillors. The ward is the primary unit of English electoral geography for civil parishes, borough and district councils.

Data is also presented at the Barnet, London, and England level.