Grand, Great or Chief Župan (Велики жупан,, ) is the English rendering of a South Slavic title which relates etymologically to Župan (originally a pater familias, later the tribal chief of a unit called a župa). It was most commonly attested among the Serbs.

Bulgaria

A decorated silver cup with a Medieval Greek inscription attests to the use of the title zoupanos megas in 9th-century Bulgaria. The inscription refers to a certain Sivin (Bulgar name ), who appears to have held that position at the time of Kniaz Boris I (852–889). Sivin was among the Bulgarian boyars who supported the official Christianization, as the subsequently added line "May God help" suggests. The title zoupan tarkanos was also interpreted as having same or similar meaning.

Serbia

In the Middle Ages, the Serbian veliki župan (велики жупан) was the supreme chieftain in the multi-tribal society. The title signifies overlordship as the leader of lesser chieftains titled župan. It was used by the Serb rulers in the 11th and 12th centuries. In Greek, it was known as archizoupanos (ἄρχιζουπάνος), megazoupanos (μεγαζουπάνος) and megalos zoupanos (μεγάλος ζουπάνος). In the 1090s, Vukan became the veliki župan in Grand Principality of Serbia. Stefan Nemanja expelled his brother Tihomir in 1168 and assumed the title of veliki župan, as described in the Charter of Hilandar (и постави ме великог жупана). A Latin document used mega iupanus for King Stefan the First-Crowned (Stephanus dominus Seruie siue Rasie, qui mega iupanus). Afterward, it was a high noble rank with notable holders such as Altoman Vojinović ( 1335–59).

Yugoslavia

It was used in the Kingdom of Serbs, Croats and Slovenes (1922–29) as a governmental title for the head of the oblast (an administrative division), the state was divided into 33 oblasts.