Haidong (Chinese: 海东市; pinyin: Hǎidōng shì) is a prefecture-level city of Qinghai province in Western China.

On 8 February 2013 Haidong was upgraded from a prefecture (海东地区) into a prefecture-level city.

Haidong was historically populated by the Qiang people, although the area has been inhabited as early as 6000 years ago.

In 399 AD the Xianbei founded the state of Nanliang, with its capital in Ledu District.

Mountain ranges tower above the district of which the main valley is the one of the Huang Shui (Tib.