[dbaupp]

Just for others' reference, the metropolitan area of Stockholm[0] is the whole of the Stockholm county.

Just looking at the map, a slightly better/more conventional measure of Stockholm might be Stockholm municipality[1] + Huddinge, Sundbyberg and Solna, which gives an area of 350 km2 and a population of about 1.1 million.

[0]: https://en.wikipedia.org/wiki/List_of_metropolitan_areas_in_... [1]: https://en.wikipedia.org/wiki/Stockholm_Municipality

[subsystem]

I would really only call the city centre [0] an "urban area" i.e. somewhere you could find a decent bar etc.

http://en.wikipedia.org/wiki/Stockholm_City_Centre