Kazimierz Ostrowski (February 14, 1917, in Berlin – July 12, 1999, in Gdynia) was a Polish painter.

In 1934 Ostrowski left for Gdynia where together with his brother Zygmunt he painted signs and names of ships (among others SS Kościuszko and MS Batory).

After World War II in 1945 he reported together with his father and two brothers to the Urban Office in Gdynia where he was given the task of changing the street names and signs on the buildings of State institutions.

In the same year he began his painting studies at the Academy of the Fine Arts in Sopot.

From 1964 to 1987 he was professor in the painting atelier at the Academy of Fine Arts in Gdańsk.