In the early 1900s, Ostrowiec had many Zionist and other movements described in the articles, from the 1971 Yizkor book, below:
Movements in Ostrowiec
by Simcha Mintzberg
Movements & Modern School Systems
by Iser Boymfeld
The Revisionist Zionist Movement in Ostrowiec
by I. Birnzweig
“The Zionist Youth” [HaNoar HaTzioni] Arouse the Jews to Aliyah
by Moshe Blajberg

Shomer Hatzair

Poalei Zion group 1918
קבוצת פועלי ציון ב1918

Poalei Zion group 1919
קבוצת פועלי ציון 1919

Poalei Zion “Youth” group 1920
קבוצת הנוער פועלי ציון ב1920.