Ishme-Dagan II orIšme-Dagān II, inscribed^miš-me^dda-gan and meaning “(the god)Dagan has heard,” was a rather obscure ruler ofAssyria, sometime during the first half of the 16th century BC in the midst of a dark age (Edzard's "dunkles Zeitalter"), succeeding his father,Shamshi-Adad II, and in turn succeeded byShamshi-Adad III from whose reign extant contemporary inscriptions resume. According to theAssyrian Kinglist, he reigned sixteen years.

He belonged to the so-calledAdasi dynasty, founded by the last of seven usurpers who succeeded in the turmoil following the demise ofShamshi-Adad I’sAmorite dynasty. He is only known from king lists.^[2] The relationship with his successor is uncertain as the copies describe Shamshi-Adad III's father as Ishme-Dagan, the brother ofSharma-Adad II, who was in turn the son ofShu-Ninua. This Ishme-Dagan, however, has his filiation clearly given as son of Shamshi-Adad II. This led Yamada to suggest that Shamshi-Adad III's father was a different homonymous individual from a collateral line of descent from Shu-Ninua.^[3]

• 16th-century BC Assyrian kings

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