Haitian Vodou[a] (/ˈvoʊduː/) is an African diasporic religion that developed in Haiti between the 16th and 19th centuries. It arose through a process of syncretism between several traditional religions of West and Central Africa and Roman Catholicism. There is no central authority in control of the religion and much diversity exists among practitioners, who are known as Vodouists, Vodouisants, or Serviteurs.

Vodou teaches the existence of a transcendent creator divinity, Bondye, under whom are spirits known as lwa. Typically deriving their names and attributes from traditional West and Central African deities, they are equated with Roman Catholic saints. The lwa divide into different groups, the nanchon ("nations"), most notably the Rada and the Petwo, about whom various myths and stories are told. This theology has been labelled both monotheistic and polytheistic. An initiatory tradition, Vodouists commonly venerate the lwa at an ounfò (temple), run by an oungan (priest) or manbo (priestess). Alternatively, Vodou is also practised within family groups or in secret societies like the Bizango. A central ritual involves practitioners drumming, singing, and dancing to encourage a lwa to possess one of their members and thus communicate with them. Offerings to the lwa, and to spirits of the dead, include fruit, liquor, and sacrificed animals. Several forms of divination are utilized to decipher messages from the lwa. Healing rituals and the preparation of herbal remedies and talismans also play a prominent role.