Kostomuksha (Russian: Костому́кша; Karelian: Koštamuš; Finnish: Kostamus; Veps: Kostamukš) is a town in the northwest of the Republic of Karelia, Russia, located 30 kilometers (19 mi) from the border with Finland, on the shore of Lake Kontoki.

[citation needed] The town was later expanded by Soviet building companies but maintaining plenty of green areas.

A wood processing complex being developed by Swedwood (an industrial group within IKEA) will include a sawmill, chip-board and furniture factory.

Every summer there is a chamber music festival to which musicians, orchestras and theater groups come from Moscow, St. Petersburg, and other parts of Russia.

In summer, the town enjoys more than two months of uninterrupted sunlight and many inhabitants spend time at their dachas, typically situated on the banks of one of the many lakes in the vicinity, which also attract anglers due to their large fish populations.