Religion in Cambodia Buddhism in Cambodia Buddhism in Cambodia is currently a form of Theravada Buddhism. Buddhism has existed in Cambodia since at least the 5 th century, and in its earlier form was a type of Mahayana Buddhism. Approximately 95% of Cambodia’s population follows Theravada Buddhism, heavily influenced by Shaivism and Vaishnavism and by animism, with Islam, Christianity, and tribal animism making up the bulk of the remainder. The wat (Buddhist Monastery) and Sangha (monkhood), together with essential Buddhist doctrines such as reincarnation and the accumulation of merit, are at the center of religious life, but interact with indigenous beliefs such as the central role of ancestors and spirits. Buddhism has existed in Cambodia since at least the 5 th century AD, with some surges placing its origin as early as the 3 rd century BC. Theravada Buddhism has been the Cambodian state religion since the 13 th century AD