Nikolayevsky

Nikolayevsky (masculine), Nikolayevskaya (feminine), or Nikolayevskoye (neuter) may refer to:
 * Yuri Nikolaevsky (1937–2004), Soviet/Ukrainian chess player
 * Mykolaiv Oblast (Nikolayevskaya oblast), an oblast of Ukraine
 * Nikolayevsky District (disambiguation), several districts in the countries of the former Soviet Union
 * Nikolayevskoye Urban Settlement, several municipal urban settlements in Russia
 * Nikolayevsky (rural locality) (Nikolayevskaya, Nikolayevskoye), several rural localities in Russia
 * Nikolayevsky Rail Terminal (disambiguation), several rail terminals in Russia
 * Nikolayevsky Fortress Infantry Regiment, fortress infantry regiments of the Imperial Russian Army