| Ishtup-Ishar | |
| King of Mari | |
| Reign: | c. 2400 BC Middle Chronology |
| Predecessor: | Saʿumu |
| Successor: | Iblul-Il |
| Succession1: | King of Mari |
Ishtup-Ishar (Ištup-Išar) was a king (Lugal) of the second Mariote kingdom who reigned c. 2400 BC.[1] The king's name was traditionally read as Išhtup-šar, with šar being a common divine element in personal names attested in the region.[2] However, the king's name is read as Ishtup-Ishar by Alfonso Archi, Ishar being an important justice deity worshiped in Mari and Ebla.[3]
In a letter written by the later Mariote king Enna-Dagan, Ishar is attested conquering and destroying the Eblaite cities of Lalanium and Emar.[4]