It is not related to any sort of administrative delimitation, and thus, its limits are ambiguous.
According to data from the OECD it has an estimated 2021 population of 6,980,646 people[1] and covers an area of 5,335.97 square kilometres (2,060.23 sq mi).
[6] The largest suburbs are to the south, and in general along the main motorways leading out of Madrid.
In regard to the Madrid functional urban area (FUA), that is, the wider commuting zone, the territory has experienced by the turn of the 21st century an increase of extensive suburbanisation with a larger share of inhabitants living more than 25km away from the functional urban centre as well as the deepening of the traditional NW-SE socio-spatial segregation pattern.
[8] Another challenge is the lack of environmental sustainability of the current mobility model.