| Longjiang County | |
| Postal Code Type: | Postal code |
| Settlement Type: | County |
| Pushpin Map: | China Heilongjiang |
| Pushpin Label: | Longjiang |
| Pushpin Map Caption: | Location of the seat in Heilongjiang |
| Coordinates: | 47.3303°N 123.1836°W |
| Subdivision Type: | Country |
| Subdivision Name: | People's Republic of China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Heilongjiang |
| Subdivision Type2: | Prefecture-level city |
| Subdivision Name2: | Qiqihar |
| Area Total Km2: | 6,197 |
| Population As Of: | 2018 |
| Population Density Km2: | auto |
| Population Total: | 580,847 |
| Population Footnotes: | [1] |
| Timezone: | China Standard |
| Utc Offset: | +8 |
Longjiang 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 6197km2 and a population of approximately 600,000.
Longjiang County is divided into 8 towns and 6 townships.[2]