| Alexandru Iliaş | |
| Succession: | Prince of Wallachia (1st reign) |
| Reign1: | September 1616 – May 1618 |
| Predecessor1: | Gabriel Movilă |
| Successor1: | Gabriel Movilă |
| Succession2: | Prince of Moldavia (1st reign) |
| Reign2: | 10 September 1620 – October 1621 |
| Predecessor2: | Gaspar Graziani |
| Successor2: | Ștefan IX Tomșa |
| Succession3: | Prince of Wallachia (2nd reign) |
| Reign3: | January 1628 – October 1629 |
| Predecessor3: | Alexandru Coconul |
| Successor3: | Leon Tomșa |
| Succession4: | Prince of Moldavia (2nd reign) |
| Reign4: | 5 December 1631 – April 1633 |
| Predecessor4: | Moise Movilă |
| Successor4: | Miron Barnovschi-Movilă |
| Issue: | Radu XI Iliaș, Iliaș Alexandru |
| House: | Bogdan-Mușat |
| House-Type: | Dynasty |
| Father: | Iliaş |
| Birth Date: | unknown |
| Death Date: | 1666 |
| Religion: | Orthodox |
Alexandru IV Iliaș was Prince of Wallachia from 1616 to 1618, then from 1628 to 1629, and Prince of Moldavia from 1620 to 1621 and 1631 to 1633.
Alexandru IV Iliaș was the son of Ilie, or Iliaș, himself son of Alexandru IV Lăpușneanu, Prince of Moldavia. His father was elected Prince of Wallachia in March 1591 but he could not win against Radu.
Alexandru IV was approved Prince of Wallachia by the Ottomans from September 1616 to November 1618 and from October 1629 to September 10, 1630. He was also Prince of Moldavia under the name Alexandru Ilie from September 10, 1620 (after the Battle of Țuțora) to October 1621 and from December 1631 to April 1633; he died the same year (or 1666).
From an unknown wife he left two sons: