Stanisław Bagieński was a Polish painter and illustrator.

Initially, he studied under his father Feliks Bagieński (1840–1922). He began his studies in the Drawing Class in Warsaw under Wojciech Gerson, he continued his painting studies in the years 1901–1903 at academies in Munich and Paris. He belonged to the artistic association "Pro Arte", from 1927 he was a professor at the Warsaw School of Fine Arts .

Stanisław Bagieński painted genre scenes, views of Warsaw, Tatra and sea motifs. However, the core of his work were battle scenes and compositions glorifying the Polish soldier. Most often he used themes from the Napoleonic times, the November Uprising and World War I. He exhibited his paintings in the Warsaw "Zachęta" and in the art salon of Aleksander Krywult.

He was also an illustrator, publishing his works in Warsaw's Tygodnik Ilustrowany, Biesiada Literacka and Świecie. He also illustrated books , including by Walery Przyborowski.