| Tonghe County | |
| Native Name: | 通河县 |
| Native Name Lang: | zh-Hans |
| Postal Code Type: | Postal code |
| Postal Code: | 1509XX |
| Area Code: | 0451 |
| Settlement Type: | County |
| Image Map1: | Location of Harbin Prefecture within Heilongjiang (China).png |
| Map Caption1: | Harbin in Heilongjiang |
| Subdivision Type: | Country |
| Subdivision Name: | People's Republic of China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Heilongjiang |
| Subdivision Type2: | Sub-provincial city |
| Subdivision Name2: | Harbin |
| Subdivision Type3: | Divisions |
| Seat: | Tonghe (Chinese: 通河镇) |
| Area Footnotes: | [1] |
| Area Total Km2: | 5675.5 |
| Population Footnotes: | [2] |
| Population Total: | 210650 |
| Population As Of: | 2010 |
| Population Density Km2: | auto |
| Coordinates: | 45.99°N 128.746°W |
| Elevation M: | 107 |
| Timezone: | China Standard |
| Utc Offset: | +8 |
Tonghe County is under the administration of Harbin, the capital of Heilongjiang province, People's Republic of China, located on the northern (left) bank of the Songhua River. It is to the east of central Harbin, bordering Yilan County to the east, Fangzheng County to the south, Mulan County to the west, as well as the prefecture-level city of Yichun to the north.
Tonghe County has a monsoon-influenced humid continental climate (Köppen Dwa/Dwb), with long, very dry, bitterly cold winters, very warm and humid summers, and short, rather dry spring and autumn in between. Its location in the Songhua River Valley at an elevation of 107m (351feet) allows for cool air to pool in and around the county seat, depressing temperatures slightly as compared to Harbin. The monthly 24-hour average temperature ranges from NaN°C in January to 22.1°C in July, and the annual mean is 2.93°C. Close to 65% of the annual precipitation occurs from June to August. With monthly percent possible sunshine ranging from 46% in July to 66% in February, the area receives 2,413 hours of bright sunshine annually, with the latter half of winter being especially sunny.
There are eight towns in the county:[3] [4]
The population of the district was in 1999.[5]