Juraj Ratkaj (also known as Juraj Rattkay, born in Veliki Tabor, on December 22, 1612 — Zagreb, on September 1, 1666) was a Croatian historian, priest and nobleman. Born in the Croatian noble family, barons of Veliki Tabor, he was a member of the Society of Jesus. Later on he became a priest and the canon of Zagreb. He took part in the Thirty Years' War in 1647 and fought the Ottomans as well. His best known work is Memoria regum et banorum regnorum Dalmatiae, Croatiae et Sclavoniae.