Pervomaysk, or Pervomaisk, is a popular toponym in countries of the former Soviet Union that is derived from the holiday May Day (Russian: Первое Мая, Pervoye Maya), the International Workers' Day.
Pervomaysk or Pervomaisk may refer to:
- Pervomaysk, Russia, multiple places in Russia
- Pervomaisk, Ukraine, multiple places in Ukraine
See also
- Pervomaisc (disambiguation), toponyms in Moldova
- Pervoye Maya (disambiguation)
- Pervomaysky (disambiguation)
- Pervomaiske (disambiguation)
- Pervomaiske Raion, a district in Crimea, Ukraine