Nogoonnuur (Mongolian: Ногооннуур, green lake) is a sum (district) of Bayan-Ölgii Province in western Mongolia.

It is primarily inhabited by ethnic Kazakhs.

As of 2014 it had a population of 6003 people.

[1] Part of the potentially valuable Asgat Ag-Sb deposit[2] is within Nogoonnuur where the Asgat mine is situated on the border with Russia.

This Mongolia location article is a stub.