Jönköping is a city in southern Sweden with 112,766 inhabitants (2022). Jönköping is situated on the southern shore of Sweden's second largest lake, Vättern, in the province of Småland. In late 2019, Jönköping was seen as the city with best future prospects in Sweden by WSP.

Vättern is the second largest lake by surface area in Sweden, after Vänern, and the sixth largest lake in Europe. It is a long, finger-shaped body of fresh water in south central Sweden, to the southeast of Vänern, pointing at the tip of Scandinavia. Being a deep lake at 128 metres (420 ft) below sea level at its deepest point, Vättern is about 1/3 the surface area of Vänern but in spite of this contains roughly 1/2 of its water.