Mölndal is a part of the Gothenburg urban area on the west-coast of Sweden, and constitutes the administrative centre of Mölndal Municipality. About 40,000 of the municipality's 60,000 inhabitants live here.Mölndal is located on the western main line railway between Gothenburg and Malmö and the European highways E6/E20 run through the area from north to south. Mölndal is served by the Gothenburg tramway system.
The name of the city derives from two words; Möln, which is a short form for Möllor, an old word for mills, and the word dal, which is the Swedish word for valley. Mölndal is the "Valley of mills". The narrow but high and long waterfalls in Kvarnbyn gave the necessary power to all the watermills that together with the windmills on the hills gave birth to the early industrialisation of Mölndal.