Jussarö ({{langx|fi|Jussaari}}) is a Finnish island in the Gulf of Finland. It is also a national park.{{Citation needed|date=November 2024}} It is located in the municipality of Ekenäs, Raseborg, Finland.{{Citation needed|date=November 2024}} Jussarö is known for the Jussarö Lighthouse.{{Citation needed|date=November 2024}} There is also an iron ore mine, but it was closed in 1967.{{Citation needed|date=November 2024}} The iron ore occurrence is the biggest undersea deposit in Finland and caused ships' compasses to malfunction.{{Citation needed|date=November 2024}} In Jussarö, some abandoned buildings still remain, which were used by the military until 2005 for urban war simulations. Many semi-destroyed structures remain from that time, featured in the 2019 TV-series Abandoned Engineering. Jussarö is known as the only ghost town in Finland. Part of the island is open to visitors.{{Citation needed|date=November 2024}} Russian prisoners worked in the undersea Jussarö mines in the 19th century. Conditions were very harsh. The island also had its own parish.{{Citation needed|date=November 2024}}

Lilla Jussarö

Approximately 200 m to the north of Jussarö is Lilla Jussarö. This smaller island, consisting of a few houses and a harbour was once owned by Nokia.