Data is gathered by the Office for National Statistics (ONS).
Despite the terminology, which is also used by the ONS, the city regions are established on the basis of local devolution deals, which results in also less populated areas being included within this list, whilst some other major cities in the UK might be excluded.
The list also does not delineate metropolitan or urban areas, which are separate concepts.
The following is the list of city regions for the year 2022 as provided by the ONS.
In addition, new local devolution deals have been established since 2022, and they are not included in the table above.