Berdyansk (bĕrˌdyänskˈ) [key], city (1989 pop. 133,000), in SE Ukraine on the Berdyansk Gulf of the Sea of Azov. It is a port and a rail terminus. Industries include fishing and fish processing, flour milling, oil refining, and the production of machinery, cables, and clothing. Berdyansk is also a health and seaside resort. The city was founded in 1827. From 1939 to 1958 it was called Osipenko.