Berezanka Raion (Ukrainian: Березанський район) was a raion (district) of Mykolaiv Oblast, Ukraine. Its administrative center was the urban-type settlement of Berezanka. The raion was situated in the southwestern part of Mykolaiv Oblast, bordering the Black Sea to the south.
The raion was abolished on 18 July 2020 as part of the administrative reform of Ukraine, which significantly reduced the number of raions across the country. The territory of Berezanka Raion was subsequently merged into the enlarged Mykolaiv Raion. At the time of its abolition, the estimated population of the raion was 22,763 (2020 est.).