Ljubomir "Ljuba" Tadic (14 May 1925 – 31 December 2013) was a Serbian academic and politician.
He was born in Smrijecno village near Plužine, then in the Kingdom of Serbs, Croats and Slovenes.
He was a Belgrade Law School graduate and a professor of philosophy at the University of Belgrade Faculty of Philosophy as well as a member of the Serbian Academy of Sciences and Arts.
His father Pavle Tadic was a lieutenant of the Montenegrin Army in the wars against the Ottomans.
Pavle opened the first school in Piva, during the Kingdom of Yugoslavia.
Tadic was one of the founders of the Democratic Party (DS) in Serbia in December 1989.
He was one of the leaders of the pro-European movement in Serbia.
Tadic was of the Piva Herzegovinian clan.
Tadic was married to psychiatrist Nevenka Tadic and had two children.
His son Boris Tadic served as the President of Serbia from 2004 to 2012.