Ninmug or Ninmuga was a Mesopotamian goddess. She was associated with artisanship, especially with metalworking, as evidenced by her epithet tibira kalamma, "metalworker of the land." She could also be regarded as a goddess of birth and assistant of Ninmah, most likely because the fashioning of statues of deities and the birth of children could be described with the same terms in Sumerian texts. Her main cult centers were Kisiga, whose location remains uncertain, and Adab.