Diniktum, inscribed Di-ni-ik-tumKI, was a still unlocated middle bronze-age town often thought to be located somewhere in the Diyala Governorate of Iraq.

[1] It enjoyed independence briefly during the 18th century under the reigns of the Amorite chieftains (ra-bí-an MAR.DÚ) Itur-šarrum,[2] attested on a single seal from Ešnunna, and Sîn-gāmil, son of Sîn-šēmi and a contemporary of Zimri-Lim (ca.

1728–1686 BC short) of Babylon, attested in a brick inscription "Sin-gamil, Amorite chief of Diniktum, son of Sin-semi.".

[13][14] An early proposal was on the Tigris river downstream from Upi and close to the northern border of Elam.

A local resident there turned in six UrIII/Larsa cylinder seals (one mentioned the god Ninib) and an inscribed brick.

The brick read "Sîn-gāmil the great leader of Martu of the city Diniktum son of Sin-šemi".