Dzyarzhynsk or Dzerzhinsk, formerly known as Koydanava until 1932, is a town in Minsk Region, Belarus. It serves as the administrative center …Dzyarzhynsk or Dzerzhinsk, formerly known as Koydanava until 1932, is a town in Minsk Region, Belarus. It serves as the administrative center of Dzyarzhynsk District. As of 2024, it has a population of 29,796.