Antoni Barnaba Jabłonowski (1732–1799) was a Polish noble (szlachcic) and political activist. Antoni became voivode of Poznań Voivodship in 1760, castellan of Kraków since 1782, starost of Międzyrzecz, Busko-Zdrój, Świecie and Czehryń. During the Confederation of Bar he was envoy of the leaders of the confederation to the royal court in Austria. He participated in the Great Sejm in 1788–1792 and was member of the Patriotic Party. He was a supporter of the 3 May Constitution. In 1794 he participated in the Kościuszko Uprising. Knight of the Order of the White Eagle, awarded on 3 August 1761, in Warsaw.