Ḫišamītum or Ḫišametum was a Mesopotamian goddess worshiped in the kingdom of Mari. She was the tutelary deity of the city of Ḫišamta, and it is presumed she originated as a hypostasis of Ishtar. Sacrifices to her are mentioned in various administrative documents from the reigns of kings such as Yaḫdun-Lim and Zimri-Lim. She is also known from letters and a compendium of divination.