Odderøya is an island and neighborhoods in Kristiansand municipality in Agder county, Norway. The 0.7-square-kilometre island lies immediately to the south of the city centre of Kristiansand and it is connected to the mainland by four bridges. The island creates a natural division between the eastern and western parts of the port of Kristiansand. Gravanekanalen canal separates Odderøya from the city center and the fish wharf. Prior to 1993, the island was owned by the Norwegian government and it was used as a naval base and training grounds, but since that time, the municipality of Kristiansand has taken over and is now using it for recreational purposes. The island is mostly undeveloped, but the town development plan does include an area on the island for up to 500 homes.