Tongjiang is a city of 160,000 in eastern Heilongjiang province, People's Republic of China, located at the confluence and on the right banks of the Songhua and Amur Rivers, the latter which marks the border with Russia. Administratively, it is a county-level city of Jiamusi.

Heilongjiang is a province in northeast China. It is the northernmost and easternmost province of the country and contains China's northernmost point and easternmost point.