Celtic Neopaganism refers to Neopagan movements based on Celtic polytheism.

An assumption that the ancient religious practices of the peoples of the British Isles mirror those of contemporary Native peoples of America and Australia underlies the popularity of Celtic Shamanism, with its related books, training courses and Druidic Sweat Lodges. An underlying assumption found amongst both scholars and neopagans is that shamanism is the most ancient and universal form of religious behaviour. This subsequently leads to the identification of shamanistic elements in early Irish tales such as Buile Suibhne and the stories of Finn MacCool. Thus myth and legend are interpreted as evidence that contemporary Celtic shamanism is revitalising an ancient spiritual discipline, rather than historical or archeological evidence.