Prince Józef Aleksander Jabłonowski (4 February 1711–1777) was a Polish nobleman (szlachcic).
Józef became Stolnik of Lithuania in 1744, voivode of Nowogródek Voivodeship from 1755 to 1772 and starost of Busk, Ukraine, Korsuń, Zvenyhorodka, Wołpenia, Rakancin and Ławara. He founded the Societas Jablonoviana (Towarzystwo Naukowe Jablonowskich) – "Science Society of the Jablonowski Family".
He died in 1777 and was buried in the Pleissenburg Castle in Leipzig, Germany.