Twelve More Finnish National Parks in Order of Founding, From Lemmenjoki in 1956 to the Bothnian Sea in 2011

Lemmenjoki was established in 1956 and later expanded twice. It lies in Inari and Kittila in Lapland, takes its name from the Lemmenjoki River, and is classified under IUCN category Ib as a wilderness area.

Liesjarvi, also listed as founded in 1956, is a lake highland in Kanta-Hame with more than 40 kilometres of shoreline despite its modest size. Part of it was first protected in 1920, and the Korteniemi traditional estate inside it offers camping.

Oulanka, the third park listed from 1956, spans Northern Ostrobothnia and Lapland. It was expanded in 1982 and 1989, and it borders Paanajarvi National Park in Russia, so together they form a protected area across the Finnish-Russian frontier.

Petkeljarvi, the fourth park of 1956, is a small area of light Scots pine forest and eskers in Ilomantsi, North Karelia. It still holds fortifications from the Continuation War.

Patvinsuo, founded in 1982, lies in Lieksa and Ilomantsi in North Karelia and is a mix of bog, former managed forest, old slash-and-burn ground and old-growth forest. About 80 kilometres of marked trails cross it, and with neighboring Petkeljarvi it forms the North Karelian Biosphere Reserve recognized by UNESCO.

Lauhanvuori, also from 1982, lies on the border of Kauhajoki and Isojoki in South Ostrobothnia. It protects pine forestland, spring brooks and swamps on a hill in otherwise flat farming country.

The Eastern Gulf of Finland park, the third from 1982, is in Kymenlaakso and protects a scatter of islands and skerries in the easternmost part of the Gulf of Finland. Its land is tiny, so most of what it protects is rock and shoreline in the open water.

Paijanne was established in 1993 among the southern islands of Lake Paijanne. It consists of some 50 unbuilt islands together with parts of several inhabited ones, a lake park rather than a forest park.

Puurijarvi-Isosuo, also from 1993, spans Pirkanmaa and Satakunta and centers on large swamp areas and Lake Puurijarvi. It also protects the near-natural alluvial shores of the Kokemaenjoki river.

Nuuksio, founded in 1994 in Espoo, Kirkkonummi and Vihti, is lakes and forest less than 30 kilometres from downtown Helsinki. It is the second-closest national park to the capital after Sipoonkorpi, and public transport makes it one of the most visited in the country.

Leivonmaki, established in 2003 in Joutsa, Central Finland, is a microcosm of the region's landscapes: swamps, the shores of Lake Rutajarvi and esker forests. It recorded roughly 29,100 visits in 2024.

The Bothnian Sea park, established in early 2011 across Southwest Finland and Satakunta, closes the path. About 98 percent of its surface is water, so it protects an archipelago and marine habitat instead of a patch of forest.