Tidaholm (pronunciation) is a locality and the seat of Tidaholm Municipality in Västergötland Province within Västra Götaland County, Sweden. The city consists of 520 square kilometers, or a little more than 200 square miles. It is located on the Tidan River, the only river in Sweden that flows north. Two islands are included within the city limits: Vulcanön and Turbinhusön, the former was originally Tidaholm's industrial center and the latter historically housed the Turbine. As of 2021, there were 13,000 inhabitants.