Mariinsky (masculine), Mariinskaya (feminine), or Mariinskoye (neuter) may refer to:
- Mariinsky Theatre, Saint Petersburg, and the ensembles headquartered there (both formerly known as Kirov):
- Mariinsky Theatre Orchestra
- Mariinsky Ballet
- Mariinsky Palace, Saint Petersburg
- Mariinsky Hospital, a hospital in Saint Petersburg, Russia; birthplace of Fyodor Dostoyevsky
- Mariinsky District, a district of Kemerovo Oblast, Russia
- Mariinsky (rural locality) (Mariinskaya, Mariinskoye), name of several rural localities in Russia
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