Wilhelm Ellis Rau Palace (Polish: Pałacyk Wilhelma Ellisa Raua) is a historical building, located on Ujazdów Avenue in Warsaw, Poland.

[1] The palace was built between 1866 and 1868 under architect Leandro Marconi's designs.

In the nineteen-twenties of the Polish interwar period the palace was rented by the Ministry of Foreign Affairs, serving the function of vice-minister Jan Szembek's residence.

After World War II, the building was rebuilt between 1948 and 1949, under Polish architect Szymon Syrkus and Swiss architect Hans Schmidt.

[2] The palace, which is next to the US Embassy, houses the Embassy of Switzerland and the Swiss export promotional organisation Osec.