Orsa Lake, Freshwater lake in Dalarna, Sweden

Orsa Lake (Orsasjön) is a lake in the Swedish province of Dalarna, 14 km long and 6.5 km wide, with an area of 53 km² and a maximum depth of 94 m. It lies 161 m above sea level and drains into Siljan through the 4 km sound Moranoret, formed by the Ore and Österdal rivers.

Orsa Lake lies in the Oreälven river system, which drains into Siljan through the 4 km sound Moranoret; both lakes sit at 161 m above sea level. The lake is 14 km long, 6.5 km wide, covers 52.1 km² and reaches 94 m deep. Its outflow area, which SMHI calls Utloppet av Orsasjön, covers 117.54 km² and holds 313 upstream catchments.

The lake is crossed by the Oreälven, and its outflow forms the Orsälven, also called Moranoret, a 4 km sound linking it to Siljan. The 340 km Siljansleden hiking trail circles both Orsa Lake and Siljan, passing the shores of this lake.

Orsa Lake lies in the municipalities of Orsa and Mora in Dalarna, at 161 metres above sea level, and drains into Siljan through the 4 km sound Moranoret. The 340 km Siljansleden hiking trail circles both Orsa Lake and Siljan, so walkers can follow marked paths along the shore. The lake is 14 km long and 6.5 km wide, with a maximum depth of 94 m.

The Siljansleden hiking trail, 340 km long, circles both Orsa Lake and neighbouring Siljan. The lake drains into Siljan through Moranoret, a sound about 4 km long formed by the Oreälven and Österdalälven rivers; the two lakes share the same surface level of 161 m above sea level.