Longjiang (simplified Chinese: 龙江; traditional Chinese: 龍江; pinyin: Lóngjiāng) is a county under the jurisdiction of Qiqihar City in the west of Heilongjiang province of the People's Republic of China, bordering Inner Mongolia to the west and southwest.

It is the home of astronaut Zhai Zhigang.

The county has an area of 6,197 km2 (2,393 sq mi) and a population of approximately 600,000.

Longjiang County is divided into 8 towns and 6 townships.

[2] 2 Formally part of Oroqen Banner in Inner Mongolia but administered de facto by Daxing'anling Prefecture in Heilongjiang.