Store Mosse ("Big Marsh") is a national park in Småland in southern Sweden, located in the municipalities of Vaggeryd, Gnosjö and Värnamo.

It has the largest boggy grounds south of Lapland and is an important area for birds and provides unique habitats for other animals and plants.

The park has over 40 km (25 mi) of walking trails, three cabins available for overnight stay and a large bird watching tower.

Access to the park is free; guided tours are available all summer.

At the Store Mosse national park there is a visitors' center called Naturum, where information about the history of the national park and its landscape, plants and animals is available.