| Kryvoozerskyi Raion | |
| Native Name: | Кривоозерський район |
| Native Name Lang: | uk |
| Settlement Type: | Raion |
| Flag Alt: | Flag of Kryvoozerskyi Raion |
| Shield Alt: | Coat of arms of Kryvoozerskyi Raion |
| Mapsize: | 250px |
| Coordinates: | 48.0142°N 30.4428°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Mykolaiv Oblast |
| Parts Type: | Subdivisions |
| Parts Style: | coll |
| P1: | 0 — city councils |
| P2: | 1 — settlement councils |
| P3: | 15 — rural councils |
| P4: | Number of localities: 0 — cities |
| P5: | |
| P6: | 22 — villages |
| P7: | 4 — rural settlements |
| Established Title1: | Established |
| Established Date1: | 1923 |
| Established Title2: | Disestablished |
| Established Date2: | 18 July 2020 |
| Seat Type: | Admin. center |
| Seat: | Kryve Ozero |
| Leader Title: | Governor |
| Leader Name: | Lyudmila Rolyan |
| Leader Title1: | Chairman |
| Unit Pref: | Metric |
| Area Total Km2: | 814 |
| Population Total: | 23,825 |
| Population As Of: | 2020 |
| 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: | 55100—55152 |
| Area Code Type: | Area code |
| Area Code: | +380 5133 |
Kryve Ozero Raion (Ukrainian: Кривоозерський район) was a subdivision of Mykolaiv Oblast of Ukraine. Its administrative center was the urban-type settlement of Kryve Ozero. The raion was abolished on 18 July 2020 as part of the administrative reform of Ukraine, which reduced the number of raions of Mykolaiv Oblast to four. The area of Kryve Ozero Raion was merged into Pervomaisk Raion.[1] [2] The last estimate of the raion population was
In the 1920s, the current area of the district belonged to Odessa Governorate. In 1923, uyezds in Ukrainian Soviet Socialist Republic were abolished, and the governorates were divided into okruhas. In 1923, Kryve Ozero Raion with the administrative center in Kryve Ozero was established. It belonged to Pervomaisk Okruha.[3] In 1925, the governorates were abolished, and okruhas were directly subordinated to Ukrainian SSR. In 1930, okruhas were abolished, and on 27 February 1932, Odessa Oblast was established, and Kryve Ozero was included into Odessa Oblast. In February 1954, Kryve Ozero Raion was transferred to Mykolaiv Oblast.[4]
At the time of disestablishment, the raion consisted of one hromada,[5] Kryve Ozero settlement hromada with the administration in Kryve Ozero.