Nikolayevsk-on-Amur (, Nikolayevsk-na-Amure, ) is a town in Khabarovsk Krai, Russia located on the Amur River close to its liman in the Pacific Ocean. Population:

The town is situated on the left bank of the Amur River, from where it flows into the Amur estuary, north of Khabarovsk and from the Komsomolsk-on-Amur railway station. It is the closest significant settlement to the Strait of Tartary separating the mainland from Sakhalin.