Ormsavatnet is a lake in Bykle Municipality in Agder county, Norway. The lake flows into the Vatndalsvatnet via a dam and canal. The lake is located in the Setesdalsheiene mountains near the lakes Store Urevatn, Holmevatnet, and Hartevatn. The nearest village area is Hovden, about to the northeast. The mountain Kaldafjellet lies about to the west of the lake.

See also List of lakes in Aust-Agder List of lakes in Norway

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