Had a polytheism religion. They had four main gods, they were An, Enlil, Enki, and NInhursbag.
Seven Gods who Decreed the Fates
They had seven gods who decreed the fates. These seven gods were An, Enlil, Enki, Ninhursbag, Nanna, Utu, and Inanna. They were followed be the 50 great gods, or Annunaki, the children of An.
Enlil is seen as the most important god. He is known as the king of heaven and earth, the father of the gods and the king of all gods