Óbuda (, ) is, together with Buda and Pest, one of the three cities that were unified to form the Hungarian capital city of Budapest in 1873. Today, together with Békásmegyer, Óbuda forms a part of the city's third district, although the toponym is also sometimes used for northern Buda as a whole.

The neighborhood proper is centered on Fo tér beside the Szentlélek tér BHÉV