Upinniemi (Swedish: Obbnäs) is a village in the municipality of Kirkkonummi in southern Finland.
[1] Upinniemi is dominated by the Finnish naval base, which is one of the largest military installations in the country.
[2] The Finnish naval base headquarters is located in Kirkkonummi, which is approximately 30 km west of Helsinki, while the military port facilities are nearer the village of Upinniemi.
[2] The base has hosted joint naval exercises with the U.S. Marine Corps in August 2022, even prior to Finland's accession to NATO in 2023.
[4] Beginning late in World War II, from 1944 to 1956, the Soviet Union operated the Porkkala Naval Base on Upinniemi, under a lease agreement with Finland.