Christiansø Postal Codes: 3760 | Bornholm, Hovedstaden

Key Facts

Christiansø is a small Danish island that forms part of the Ertholmene archipelago, located in the Baltic Sea. As the easternmost point of Denmark, Christiansø lies approximately 18 kilometers northeast of Bornholm, the larger island to which it administratively belongs within the Hovedstaden region. With a total area of just 0.22 square kilometers, Christiansø is one of Denmark's smallest inhabited territories and has a population of around 90 permanent residents. The island is characterized by its historic naval fortress, established in the late 17th century, which gives it a unique military heritage and distinctive granite architecture. Christiansø contains no formal sub-regions or municipalities due to its tiny size, functioning as a single cohesive unit under Danish administration. Visitors to Christiansø can explore its well-preserved fortifications, lighthouse, and natural bird sanctuary, while those seeking postal services for this remote location will find comprehensive code information available for the entire island community.