Borgholm is a city and the seat of Borgholm Municipality, Kalmar County, Sweden with 3,071 inhabitants in 2010. It is located on the island of Öland in the Baltic Sea.Borgholm is one of Sweden's historical towns with a former city status (stad). The city is best known for its once-magnificent fortress which is now ruined. Borgholm is, despite its small population, for historical reasons normally still referred to as a city.
The city is situated some 20 km north of the Öland bridge which connects the island with the city of Kalmar on the mainland. The city received its charter in 1816 and emerged as a spa-town in the shadow of the ruins of the once mighty Borgholm Castle, which burned down in 1806. So important and magnificent was this castle, that it has become the city arms, and the ruins are the best known attraction in the municipality, perhaps on the entire island of Öland. Slightly further south is Halltorps Estate, a historic royal estate linked to Borgholm Castle.