I'd say scientology, but it's a cult, so rastafarianism.
The least popular religion in the UK is most likely the traditional Aztec Tribal Religion. There are other good candidates as well, such as Yarsan, Yezidi, Santeria, Navajo Spiritualism and other localized religions.
CHRISTIANITY is the least popular religion in India.
According to the Israel Central Bureau of Statistics, the religious affiliation of the Israeli population as of 2011 was: 75.4% Jewish, 16.9% Muslim, 2.1% Christian, and 1.7% Druze, with the remaining 4.0% not classified by religion. Accordingly, the least popular religion in Israel is Druze. However, there are other religions that have just a handful of adherents in Israel.
Most of Balinese are Hindus at least 95% of the population are Hindu as it a very popular religion.
Hinduism is the least common religion.
A:Falun Gong is probably the least popular religion that actually has a presence in China. It is so unpopular with the government of China that it has been made illegal. It has not achieved popularity among the people of China, as it still has a small number of adherents, although anedoctal evidence suggests that membership is growing very rapidly.
Buddhism has at least 20 percent of popularity in the middle east.
One religion.
The least common religion in Vietnam is the Baha'i Faith.
The popular religion is islam.
The least popular religion in Australia is often considered to be smaller, less mainstream faiths, such as Zoroastrianism or Jainism, which have very few adherents compared to major religions. According to the 2021 Census, a significant portion of the population identifies as having no religion, indicating a trend towards secularism. Among the recognized religions, those with the smallest followings typically include various indigenous beliefs and newer spiritual movements.
Mithraism was the male only religion popular with the Roman soldiers.