Ilija Gregorić (c. 1520 – 1574) was a Croatian soldier, best known as the military commander of rebels during the Croatian and Slovenian peasant revolt of 1573. He was born in Marija Gorica, a village in Croatia. When Ottoman Turks raided Carniola in 1553, he was captured. He escaped captivity and became a professional soldier in the Military Frontier. Due to his military experience, rebel peasants elected him as the captain of their army. Now in command of the rebel forces, he tried to spread the revolt in Slovenia. His forces were defeated at the battles of Krško and Sv. Petar.