Óbuda was a town in Hungary that was merged with Buda and Pest on 17 November 1873; it now forms part of District III-Óbuda-Békásmegyer of Budapest. The name means Old Buda in Hungarian. The name in Serbo-Croatian for this city is Stari Budim, but the local Croat minority calls it Obuda. In Czech and the Slovak languages, it is called Starý Budín.

Buda was the historic capital of the Kingdom of Hungary and, since 1873, has been the western part of the Hungarian capital Budapest, on the west bank of the Danube. Buda comprises a third of Budapest's total territory and is mostly wooded. Landmarks include Buda Castle, the Citadella, and the president of Hungary's residence, Sándor Palace.