The Swedish krona (SEK) is the national currency; euros, US dollars, Norwegian and Danish kroner and Swiss francs are the most exchanged. Stockholm has the most offers, followed by Gothenburg, Malmö, Uppsala and Örebro.
Sweden is one of the most cashless countries in the world, so exchange offices are mostly at airports, central stations and in city centres. P2P offers let you swap USDT or USDC for kronor by transfer.
Below are exchange offices from open sources.