Ögii Lake (Mongolian: Өгий нуур, IPA: [ɵˈɟi nʊːr]) is a freshwater lake in Ögii nuur, Arkhangai Province, Mongolia.

The lake, designated as a Ramsar Site of International Importance, is known for its fish and for birdlife.

It is a stopover point for migrating waterbirds of the family Anatidae and has been designated an Important Bird Area by BirdLife International.

A study was conducted in 2005–2006 at the lake and its surrounding to know the total amount of habitat.

[2] There are several ger tourist camps around the lake, as well an information and training center.