The Palais Clam-Gallas is a palace in Neo-classical or Biedermeier style in Vienna, Austria. It was built in 1834 or 1835 as a summer residence by Franz Joseph, Prince of Dietrichstein.

The Palais Clam-Gallas was built as a summer residence in a park, laid out as an English garden, which had belonged to the Dietrichstein family since 1690. The architect was Heinrich Koch [de]. The building is in Neo-classical style typical of the Biedermeier period. In 1850, the palace passed by marriage into the Clam-Gallas [de] family.

It was used by American troops following the Second World War. In 1952, the Clam-Gallas family sold it to the Republic of France. In 1954, the Lycée Français de Vienne was built on a part of the grounds. From 1980, it was the home of the Institut français de Vienne, the French institute in Vienna.