Ancient Egyptian religion was a complex system of polytheistic beliefs and rituals which were an integral part of ancient Egyptian society. It centered on the Egyptians' interaction with a multitude of deities who were believed to be present in, and in control of, the forces and elements of nature. The myths about these gods were meant to explain the origins and behavior of the forces they represented, and the practices of Egyptian religion were efforts to provide for the gods and gain their favor.

Formal religious practice centered on the pharaoh, the king of Egypt. Although he was a human, the pharaoh was believed to be descended from the gods. He acted as the intermediary between his people and the gods, and was obligated to sustain the gods through rituals and offerings so that they could maintain order in the universe. Therefore, the state dedicated enormous resources to the performance of these rituals and to the construction of the temples where they were carried out. Individuals could also interact with the gods for their own purposes, appealing for their help through prayer or compelling them to act through magic. These popular religious practices were distinct from, but closely linked with, the formal rituals and institutions. The popular religious tradition grew more prominent in the course of Egyptian history as the status of the pharaoh declined. Another important aspect of the religion was the belief in the afterlife and funerary practices. The Egyptians made great efforts to ensure the survival of their souls after death, providing tombs, grave goods, and offerings to preserve the bodies and spirits of the deceased.

The religion had its roots in Egypt's prehistory and lasted for more than 3,000 years. The details of religious belief changed over time as the importance of particular gods rose and declined, and their intricate relationships shifted. At various times certain gods became preeminent over the others, including the sun god Ra, the creator god Amun, and the mother goddess Isis. For a brief period, in the aberrant theologypromulgated by the pharaoh Akhenaten, a single god, the Aten, replaced the traditional pantheon. Yet the overall system endured, even through several periods of foreign rule, until the coming of Christianity in the early centuries AD. It left behind numerous religious writings and monuments, along with significant influences on cultures both ancient and modern.