Nikolayevsky District (Russian: Никола́евский райо́н) is an administrative[1] and municipal[6] district (raion), one of the seventeen in Khabarovsk Krai, Russia.

The area of the district is 17,188 square kilometers (6,636 sq mi).

[12] Within the framework of administrative divisions, Nikolayevsky District is one of the seventeen in the krai.

[1] The town of Nikolayevsk-on-Amur serves as its administrative center,[2] despite being incorporated separately as a town of krai significance[1]—an administrative unit with the status equal to that of the districts.

[13] As a municipal division, the district is incorporated as Nikolayevsky Municipal District, with the town of krai significance of Nikolayevsk-on-Amur being incorporated within it as Nikolayevsk-na-Amure Urban Settlement.