Mölndal (Swedish pronunciation: [ˈmœ̌lndal])[2] is the seat and administrative centre of Mölndal Municipality and a part of the Gothenburg urban area on the west coast of Sweden.

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.

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.

Mölndal is best known for its high concentration of companies in life sciences.

Several other companies in areas of research such as pharmaceuticals, biomedicine, and biotechnology are also located here.