Rogen Nature Reserve, Nature reserve in Jämtland County, Sweden.

Rogen Nature Reserve is a 500 km² reserve around Lake Rogen in Härjedalen, Jämtland County, established in 1976. Its low, sinuous hills and long lakes form the type of glacial moraine named after the area, Rogen moraine, with erratic boulders scattered across the land. Mountain tops rise to between 1,000 and 1,200 m, the highest being Brattriet at 1,276 m.

Rogen Nature Reserve was established in 1976 and covers about 50,000 hectares around Lake Rogen in Härjedalen. Within its bounds are Stone Age settlements and graves, and pits of unknown age used for trapping reindeer. The reserve is part of the EU-wide Natura 2000 network.

The reserve lies in Härjedalen, the southern part of Sami reindeer-herding land, and is used as winter grazing by reindeer. The animals belong to a Sami herding community, and their presence links the protected landscape to ongoing pastoral work rather than to a past tradition.

The reserve covers about 50,000 hectares around Lake Rogen, and fishing licenses can be bought for its waters. Visitors must keep at least 100 m from muskoxen. The terrain of low moraine ridges and long lakes is best crossed with a map, as the labyrinthine layout makes orientation difficult.

Sweden's only wild muskoxen are descended from animals brought from Greenland to Norway in the mid-20th century; some crossed into Sweden in 1971. The herd is small, numbering seven animals in 2010, and visitors must keep at least 100 m away. The animals roam the reserve mainly in winter.