Vajdahunyad Castle (Hungarian: Vajdahunyad vára) is a castle in the City Park of Budapest, Hungary. It is an eclectic collage of multiple landmark buildings from different parts of the Kingdom of Hungary, especially the Hunyad Castle in Hunedoara, Romania. As the castle contains parts of buildings from various time periods, it displays different architectural styles: Romanesque, Gothic, Renaissance, and Baroque.

The statue by Miklós Ligeti of the chronicler Anonymus is displayed in the castle court. Anonymus lived in the 12th century. His true identity is unknown, but he was a notary of Béla III of Hungary, and he wrote the chronicle Gesta Hungarorum (Deeds of the Hungarians). The external wall of the castle contains a bust of Béla Lugosi, a Hungarian-American actor famous for portraying Count Dracula in the original 1931 film.

The castle was designed by Ignác Alpár and built in 1896 as part of the Millennial Exhibition, which celebrated the 1,000 years of Hungary since the Hungarian Conquest of the Carpathian Basin in 895. Originally, it was made from cardboard and wood, but it became so popular that it was rebuilt from stone and brick between 1904 and 1908. Today, the castle houses the Museum of Hungarian Agriculture, the biggest agricultural museum in Europe.