Radasłaŭ Astroŭski (Belarusian: Радаслаў Астроўскі; Polish: Radosław Ostrowski; 25 October 1887, Zapolle, Minsk Governorate, Russian Empire – 17 October 1976, Benton Harbor, Michigan, United States) was a Belarusian nationalist political activist and political leader, notably serving as president of the Belarusian Central Rada, a puppet Belarusian government under German administration in 1943-1944.
Radasłaŭ Astroŭski was born on 25 October 1887 in the town of Zapolle, Slutsk Uyezd, Minsk Governorate. He studied at the Slutsk gymnasium, but was expelled for participating in the Russian Revolution of 1905-1907. In 1908 he was accepted to the mathematical faculty of Saint Petersburg University. In 1911, he was arrested for taking part in revolutionary riots and was imprisoned at Saint Petersburg and Pskov.
After his release in 1912, he re-entered the university and later transferred to the University of Tartu, from where he graduated with a degree in physics and mathematics.
After University, Astroŭski worked as a teacher in , Poland and in Minsk. From 1915 to 1917 he taught at the Minsk Teaching Institute. After the February Revolution of 1917 he became the commissar of the Provisional Government in Slutsk paviet. In September of the same year he founded the Slutsk Belarusian Gymnasium and became its principal.