Ivan Nelipić (died 1344) was a local ruler and Duke of Knin (knez Knina), who also held Drniš and the region around the rivers Cetina, Čikola, Krka, and Zrmanja.
Ivan Nelipić's career began at the court of Mladen II Šubić of Bribir, where he held the title of Voivode.
King Charles Robert ordered the new Ban of Slavonia Nicholas Felsőlendvai and Stepan II of Kotroman to launch a joint offensive against Nelipić in Croatia.
It all eventually turned into an all-out war when the armies of Prince Nelipac and Juraj II Šubić clashed near the waterfalls of Krka in the Summer of 1324.
After seeing that Ban Nicholas Felsőlendvai was unable to weaken the position of Prince Nelipić, Hungarian King Charles I Robert deposed him.
The expedition eventually reached little success, so Mikcs sent a portion of his army to Bihać which would serve as defence against possible Nelipić's counterattacks and retreated to Hungary, to the King.