Oshun, also spelled Osun, an orisha (deity) of the Yoruba people of southwestern Nigeria. Oshun is commonly called the river orisha, or goddess, in the Yoruba religion and is typically associated with water, purity, fertility, love, and sensuality. She is considered one of the most powerful of all orishas, and, like other gods, she possesses human attributes such as vanity, jealousy, and spite.