Kostromskoy (masculine), Kostromskaya (feminine), or Kostromskoye (neuter) may refer to:
- Kostromskoy District, a district of Kostroma Oblast
- Kostromskoy (cheese), a type of Russian cheese
- Kostroma Oblast (Kostromskaya oblast), a federal subject of Russia
- Kostromskaya (rural locality), a rural locality (a stanitsa) in Krasnodar Krai, Russia
- Kostromskoye, a rural locality (a selo) in Sakhalin Oblast, Russia
This disambiguation page lists articles about distinct geographical locations with the same name.
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