Farris is a lake on the border of Telemark and Vestfold counties in Norway.

The large town of Larvik is located at the southern end of the lake.

[2] The 21-square-kilometre (8.1 sq mi) lake would have been part of the saltwater Larviksfjorden, had it not been dammed by an end moraine left by the latest ice age.

[2] The largest island in the lake is Bjørnøya, located just east of the village of Kjose.

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