Sarnaism or Sarna (local languages: Sarna Dhorom, meaning "Religion of the Holy Woods") defines the indigenous religions of the Adivasi populations of the states of Central-East India, such as the Munda, the Ho, the Santali, the Khuruk, and others. During, colonial rule it was subsumed as a folk form of Hinduism, in recent decades followers have started to develop an identity, and more recently even an organisation, distinct from Hinduism, similarly to other tribal religious movements such as Donyi-Polo or Sanamahism.

Sarnaism or Sarna (local languages: Sarna Dhorom, meaning "Religion of the Holy Woods") defines the indigenous religions of the Adivasi populations of the states of Central-East India, such as the Munda, the Ho, the Santali, the Khuruk, and others. During, colonial rule it was subsumed as a folk form of Hinduism, in recent decades followers have started to develop an identity, and more recently even an organisation, distinct from Hinduism, similarly to other tribal religious movements such as Donyi-Polo or Sanamahism.