Radomsk (Hebrew: רדומסק) is a hasidic dynasty named after the town of Radomsko in Łódź province, south-central Poland.

[3] The town of Radomsko was destroyed and most of its Jews deported and killed during the German occupation of Poland in World War II.

The fourth Radomsker rebbe, Shlomo Chanoch Hakohen Rabinowicz, was murdered by the Nazis in the Warsaw Ghetto in 1942, bringing the father-to-son dynasty to an end.

[6][7][8] When Moshe Biderman of Lelov moved to the Land of Israel he told his hasidim to follow Rabinowicz[8][9] and Radomsk became a major hasidic center.

[3][22] He also amassed a large personal collection of old manuscripts and prints that was said to be the second-largest private library in Poland after that of the Gerrer Rebbe.

As the war uprooted hundreds of thousands of Jews and decimated established communities, the shtiebelach lost their central place in Hasidic life.

[3] The Rebbe appointed his new son-in-law, Rabbi Dovid Moshe Hakohen Rabinowicz (1906–1942), to serve as rosh yeshiva for the entire network.

[20] Following the German invasion of Poland, the Keser Torah yeshivas disbanded[23] and the Rebbe escaped to the town of Alexander, but from there was most likely sent by the Nazis into the Warsaw Ghetto.

[20] His son-in-law, Rabbi Dovid Moshe Rabinowicz, was also incarcerated in the Warsaw Ghetto, where he continued to deliver shiurim to Keser Torah students.

[27] Today Radomsker communities exist in Jerusalem and Bnei Brak, Israel; Brooklyn, New York; Lakewood, New Jersey; and Montreal, Canada.