Pervomaiske (Ukrainian: Первомайське, Russian: Первомайское) is a rural settlement in southern Ukraine, locating in Mykolaiv Raion of Mykolaiv Oblast.

The Dnieper — Inhulets Canal passes just south of the settlement.

The settlement was founded in the beginning of the 20th century as the selo of Zasillia to serve the railway station of the same name.

[7][8] On 26 January 2024, a new law entered into force which abolished the status of urban-type settlement status, and Pervomaiske became a rural settlement.

[9] The closest railway station is in Zasillia, 2 kilometres (1.2 mi) southwest of the settlement, on the railway line connecting Mykolaiv and Snihurivka.