Nikolayevsk (disambiguation)

Nikolayevsk is a town in Volgograd Oblast, Russia.

Nikolayevsk or Nikolaevsk may also refer to:
 * Nikolayevsk Urban Settlement, a municipal formation which the town of district significance of Nikolayevsk in Nikolayevsky District of Volgograd Oblast, Russia is incorporated as
 * Nikolaevsk, Alaska, a town in Alaska, United States
 * Nikolayevsk-on-Amur, a town in Khabarovsk Krai, Russia