Józef Płoszko (Azerbaijani: İosif Ploşko, Russian: Иосиф Плошко; 1867–1931) was a Polish architect of the late 19th and early 20th centuries, and was the author of multiple architectural projects in Baku, Azerbaijan.

The monumental Ismailiyya building based upon the pattern of the Doge's palace in Venice, was thus Płoszko's first independent work in Baku.

A temple finished in 1908 and called "Mukhtarov’s mosque" was built on the coast of the Terek River and is one of the most beautiful buildings of Vladikavkaz.

[7] The church was constructed by funds donated by Polish industrialists – the Rylskis and Witold Zglenicki, founder of petroleum production in the Caspian Sea.

Construction of the "Palace of Happiness" in the center of Baku ordered by oil industrialist Murtuza Mukhtarov was Płoszko's next work, which now is a city administration building.

The hotel was equipped with state of the art technology of the time, sporting four elevators, sanitary appliances, central heating and concealed wiring.

Płoszko stayed in Baku after the October Revolution, worked as an engineer with Ziverbey Ahmadbeyov, another famous architect of his time, and participated in discussions of agglomerator city projects on Absheron Peninsula.