Vietnamese folk religion (Vietnamese: tín ngưỡng dân gian Việt Nam) is a group of spiritual beliefs and practices adhered to by the Vietnamese people. About 86% of the population in Vietnam are reported irreligious, but many among them practice folk religious traditions.
Vietnamese folk religion is not an organized religious system, but a set of local worship traditions devoted to the "thần", a term which can be translated as "spirits", "gods" or with the more exhaustive locution "generative powers". These gods can be nature deities or national, community or kinship tutelary deities or ancestral gods who are often deified heroic persons. Vietnamese mythology preserves narratives telling of the actions of many of the cosmic gods and cultural heroes. Ancestral veneration is practiced by most Vietnamese to varying degrees.