Suifenhe (Chinese: 绥芬河) is a county-level city in southeastern Heilongjiang province, People's Republic of China, located where the former Chinese Eastern Railway crosses the border with Russia's town of Pogranichny, Primorsky Krai.

In January 2014, Suifenhe became the only Chinese city in which trading with Russian Ruble is officially allowed.

Suifenhe and the surrounding border areas were scenes of vicious combat when the Soviet Union invaded Japanese-occupied Manchuria in August 1945.

The train station on the opposite side of the border is Grodekovo, in the town of Pogranichny, Primorsky Krai.

[10] 2 Formally part of Oroqen Banner in Inner Mongolia but administered de facto by Daxing'anling Prefecture in Heilongjiang.