Lahdenpohja (Russian: Лахденпо́хья; Finnish and Swedish: Lahdenpohja; Karelian: Lahdenpohju) is a town and the administrative center of Lakhdenpokhsky District of the Republic of Karelia, Russia, located 330 kilometers (210 mi) west of Petrozavodsk on the Aurajoki River. Population: 7,813 (2010 census); 8,751 (2002 census); 10,429 (1989 Soviet census).

Russia 1600–1617
Sweden 1617–1721
Russia (empire) 1721–1812
       Finland 1812-1917,
      autonomous part of
      - Russia (empire)
      - Russia (republic)
      - Russia (Soviet republic)
> Finland 1917–1940
>> Soviet Union 1940–1991
       - conquered by Finland
          in the Continuation War (1941–1944)
> Russia from 1991

Lahdenpohja literally means "bay's bottom". It has been a marketplace since the 17th century, located on an old trade route going as far as Oulu. It was mentioned in 1638 as Lahen Pohia, reflecting the local pronunciation of lahden (genitive case form of lahti, bay) as lahen. It was a part of the Jaakkima parish until 1924, when Lahdenpohja was separated from it as a kauppala. The locals also called it Lopotti, a Russian loanword (see sloboda) referring to a built-up area smaller than a town. Lahdenpohja was ceded to the Soviet Union after the Winter and Continuation Wars. Lakhdenpokhya is simply an alternate romanization of Лахденпохья, the Russian transcription of the Finnish name.

Town status was granted to it in 1945.^{[citation needed]}

In the early 1990s, two granite blocks of a monument to local Finnish soldiers who died in 1918 were returned to the ruins of the church, and a memorial cross was erected. With Finland's participation, the conservation of the walls of the Lutheran church was carried out.

In 1995, the Orthodox Chapel of St. George the Victorious was erected in the town.

In 2004, the Orthodox Chapel of St. Great Martyr Valentine of Rome was erected in the city.

In 2020, Ramiz Mubarizovich Kazymov, mayor of Lakhdenpokhya and a member of the United Russia party, was deprived of his driver's license for drunk driving.