Norsborg is a part of Botkyrka Municipality in Stockholm County, Sweden. Norsborg consists of the residential areas Hallunda, Eriksberg and Slagsta. Norsborg and Hallunda are contiguous suburbs. History. Norsborg was previously a country estate in the Botkyrka parish, situated on a bay of Vårbyfjärden and with some of the property facing Bornsjön, as well as Kärsby and Tomtberga with an area of 350 hectares.
https://en.wikipedia.org/wiki/Norsborg