Dzyarzhynsk or Dzerzhinsk (Belarusian: Дзяржынск, romanized: Dziarzhynsk;[a] Russian: Дзержинск), formerly known as Koydanava until 1932,[b][2] is a town in Minsk Region, Belarus.

[3] Koidanova became the site of a new Hasidic Jewish dynasty in 1833 when Rabbi Shlomo Chaim Perlow (1797–1862) became the first Koidanover Rebbe.

In June of that year it was renamed again as Dziaržynsk by the Communist authorities, in honour of Felix Dzerzhinsky (1877–1926), a famous Bolshevik creator and chief of the "Extraordinary Commission" (CHEKA) – the Soviet secret police - who was born in a Dziaržynava estate not far from the city, although on the other side of the then Polish-Soviet border.

The Lithuanian Twelfth Schutzmannschaft (auxiliary police) Battalion's 1st Company, led by Lieutenant Z. Kemzura, massacred approximately 1,600 Jews from the city on 21 October 1941, shooting them and throwing them into a pit; many were buried alive.

[citation needed] The local football club is the Arsenal Dzerzhinsk, playing in the Belarusian First League.