Pervomaisk Raion

In the beginning of the 19th century, the current area of the district belonged to Olviopolsky Uyezd of Kherson Governorate. In 1828, Olviopolsky Uyezd was merged with Yelisavetgradsky Uyezd into Bobrinetsky Uyezd. In 1865, the administrative center of Bobrinetsky Uyezd was moved to Yelisavetgrad, and the uyezd was renamed Yelisavetgradsky.[2] In 1919, Olviopol was merged with Bohopil and Holta to form the city of Pervomaisk.[3] On 16 April 1920, Kherson Governorate was renamed Nikolayev Governorate, and on 21 October 1922, it was merged into Odessa Governorate. In 1923, uyezds in Ukrainian Soviet Socialist Republic were abolished, and the governorates were divided into okruhas. Bohopil Raion of Pervomaisk Okruha was established. In 1925, the governorates were abolished, and okruhas were directly subordinated to Ukrainian SSR. In 1927, Bohopil Raion was renamed Pervomaisk Raion. In 1930, okruhas were abolished, and raions were directly subordinated to Ukrainian SSR. On 27 February 1932, Odessa Oblast was established, and Pervomaisk Raion was included into Odessa Oblast. On 17 February 1954, Pervomaisk Raion was transferred to Mykolaiv Oblast.[2][4]

On 18 July 2020, as part of the administrative reform of Ukraine, the number of raions of Mykolaiv Oblast was reduced to four, and the area of Pervomaisk Raion was significantly expanded. [5][6] The January 2020 estimate of the raion population was 28,729 (2020 est.)[7]