| Pervomaiskyi Raion | |
| Native Name: | Первомайський район |
| Native Name Lang: | uk |
| Settlement Type: | Raion |
| Flag Alt: | Flag of Pervomaiskyi Raion |
| Shield Alt: | Coat of arms of Pervomaiskyi Raion |
| Mapsize: | 250px |
| Coordinates: | 48.0117°N 30.8567°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Oblast |
| Parts Type: | Subdivisions |
| Parts: | 8 hromadas |
| Established Title: | Established |
| Seat Type: | Admin. center |
| Seat: | Pervomaisk |
| Leader Title: | Governor |
| Leader Name: | Borys Demchenko |
| Leader Title1: | Chairman |
| Unit Pref: | Metric |
| Area Total Km2: | 3792 |
| Population Total: | 145,213 |
| Population As Of: | 2022 |
| Population Density Km2: | auto |
| Timezone1: | EET |
| Utc Offset1: | +02:00 |
| Timezone1 Dst: | EEST |
| Utc Offset1 Dst: | +03:00 |
| Postal Code Type: | Postal index |
| Postal Code: | 55220—55276 |
| Area Code Type: | Area code |
| Area Code: | +380 5161 |
Pervomaisk Raion (Ukrainian: Первомайський район) is a raion (district) in Mykolaiv Oblast, Ukraine. Its administrative center is the town of Pervomaisk. Population:
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.[1] In 1919, Olviopol was merged with Bohopil and Holta to form the city of Pervomaisk.[2] On 16 April 1920, Kherson Governorate was renamed Nikolayev Governorate, and on 21 October 1922, it was merged into Odesa 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, Odesa Oblast was established, and Pervomaisk Raion was included into Odesa Oblast. On 17 February 1954, Pervomaisk Raion was transferred to Mykolaiv Oblast.[1] [3]
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. Three abolished raions, Arbuzynka, Kryve Ozero, and Vradiivka Raions, as well as the city of Pervomaisk, which was previously incorporated as a city of oblast significance and did not belong to the raion, were merged into Pervomaisk Raion.[4] [5] The January 2020 estimate of the raion population was
After the reform in July 2020, the raion consisted of eight hromadas:[5]
Before the 2020 reform, the raion consisted of three hromadas,[10]