Stockholm County (Swedish: Stockholms län [ˈstɔ̂kː(h)ɔlms ˈlɛːn]) is a county (Swedish: län) on the Baltic Sea coast of Sweden. It borders Uppsala County and Södermanland County. It also borders Mälaren and the Baltic Sea. The city of Stockholm is the capital of Sweden. Stockholm County is divided by the historic provinces of Uppland (Roslagen) and Södermanland (Södertörn). More than one fifth of the Swedish population lives in the county.
https://en.wikipedia.org/wiki/Stockholm_County