Yergeni (Ергени; Oirat: Ergnin җirn zurһan shiir) is a hilly area in Russia.

The highest point of Kalmykia, 222 metres (728 ft) high Shared, is located in the Yergeni hills.

The hills lie to the west of the lower course of the Volga, between Volgograd to the north and the Manych Depression to the south.

[2] The Sal, a left tributary of the Don, is the main river having its sources in the hills.

The climate is semi-desert and the hills are mostly covered with grasses and shrubs, including feather grass, Volga fescue, wormwood and saltwort, but some trees, such as willow, oak, elm, and aspen, may grow in the ravines of the eastern slopes.