Diniktum, inscribed Di-ni-ik-tum<sup>KI</sup>, was a still unlocated middle bronze-age town often thought to be located somewhere in the Diyala Governorate of Iraq.
It enjoyed independence briefly during the 18th century under the reigns of the Amorite chieftains (ra-bÃÂ-an MAR.DÃÂ) Itur-à ¡arrum, attested on a single seal from Eà ¡nunna, and Sîn-gÃÂmil, son of Sîn-à ¡ÃÂmi and a contemporary of Zimri-Lim (ca. 1710âÂÂ1698 BC short) of Mari and Ḫammu-rapë (ca. 1728âÂÂ1686 BC short) of Babylon, attested in a brick inscription "Sin-gamil, Amorite chief of Diniktum, son of Sin-semi.". In an old Babylonian letter from Yarim-Lim I, the king of Yamḫad to the Yaà ¡ub-Yahad, the king of DÃÂr, he says:
Yarim-Lim I would defeat the king of Diniktum in battle.
One king of Diniktum named Itur-à ¡arrum ruled Diniktum for around a century before his successor Sîn-gÃÂmil became the new ruler of the kingdom.
Ikà «n-pî-Sîn (âÂÂThe word of Sin is truthfulâÂÂ), the ruler of NÃÂrebtum (Tell Ishchali) and possibly Tutub, cities in the sphere of Eà ¡nunna, has a year name: âÂÂYear when Ikà «(n)-pî-Sîn captured Diniktum." It was absorbed into the kingdom of Eà ¡nunna and consequently embroiled in its conflicts with Elam during the reigns of IbÃÂl-pî-El II (ca. 1715âÂÂ1701 BC short) and á¹¢illë-Sîn (ca. 1700âÂÂ1698 BC short). During an Elamite invasion of Mesopotamia the Elamites sacked Eshnunna. This caused many soldiers in the Elamite army that were from Eshnunna to defect. Because of the mass desertion, the Elamite king retreated back to Diniktum. While in Diniktum, the Elamites would sue for peace with Hammurabi. The Elamites were then driven from the city.
The town was still settled in the later bronze-age, as a year name of 15th century BC Kassite ruler Kadashman-harbe I reads "the year [in which] Kadaà ¡man-Ḫarbe, the king, dug the canal of Diniktum".
An early proposal was on the Tigris river downstream from Upi and close to the northern border of Elam. It has also been suggested as being at or in the vicinity of Tell Muhammad, which lies in south-eastern part of modern Baghdad. Diniktum is mentioned in the Harmal geographical list, Tablet IM 51143.
In a survey of archaeological sites in the Diyala region of Iraq a site, Tell #851, was identified as a possible location for Diniktum. It showed surface remains from the Ubaid to Kassite periods. A local resident there turned in six UrIII/Larsa cylinder seals (one mentioned the god Ninib) and an inscribed brick. The brick read "Sîn-gÃÂmil the great leader of Martu of the city Diniktum son of Sin-à ¡emi".