In Egyptian mythology, Khnum^{[pronunciation?]} (also spelled Chnum, Knum, or Khnemu) was one of the earliest Egyptian deities, originally the god of the source of the Nile River. Since the annual flooding of the Nile brought with it silt and clay, and its water brought life to its surroundings, he was thought to be the creator of the bodies of human children, which he made at a potter's wheel, from clay, and placed in their mothers' wombs. He later was described as having moulded the other deities, and he had the titles Divine Potter and Lord of created things from himself.

The worship of Khnum centred on two principal riverside sites, Elephantine Island and Esna, which were regarded as sacred sites. At Elephantine, he was worshipped alongside Anuket and Satis as the guardian of the source of the River Nile. His significance led to early theophoric names of him, for children, such as Khnum-khufwy – Khnum is my Protector, the full name of Khufu, builder of the Great Pyramid.

Khnum has also been related to the deity Min.