Juliusz Dzierżanowski was a Polish architect.

He studied at the Institute of Civil Engineers in St. Petersburg. In 1902–1919, he worked at the Construction Department of the Municipal Office in Warsaw, and in 1921–1931, he ran his own architectural office. In 1931–1939, he worked at the Ministry of Communications, and in 1940–1943, he taught at a construction school in Krakow.