In 2020, around 28.8 percent of the global population were identified as Christian. Around 25.6 percent of the global population identify as Muslims, followed by 14.9 percent of global populations as Hindu. The number of Muslims increased by 347 million, when compared to 2010 data, more than all other religions combined.

In Brazil, 70 percent of the respondents believed in God as described in the holy scriptures, and another 19 percent believed in a higher power or spirit. In South Africa, the figures were 73 and 16 percent respectively. By contrast, less than one in five in Japan and only one in three in South Korea believed in God or some form of spirit or higher power.

Although traditionally a Catholic country, Spain saw a decline in the number of believers over the past years. Compared to 2011, when the share of believers accounted for slightly over 70 percent of the Spanish population, the Catholic community lost approximately 15 percentage points of their faithful by June 2025 with a share of 56.1 percent of the surveyed population. Believers of a religion other than Catholicism accounted for approximately 3.6 percent of the Spanish population in 2025 according to the most recent data. A Catholic majority, a practicing minority Going to mass is no longer a thing in Spain, or so it would seem when looking at the latest statistics about the matter: over 47 percent of those who consider themselves Catholics almost never attend any religious service in June 2025. The not so Catholic Spain Around 37 percent of the surveyed population stated to be either non-believers or full atheists in 2025. Non-believers or people that do not have a religious faith fluctuated over the past years with the latest figures showing a 21 percent of people that categorize themselves as so. The share of Spanish atheists is on the rise according to the most recent surveys, taking up 13.3 percent of respondents in June 2025.

According to a survey conducted in South Korea in 2023, over ** percent of respondents reported no religious affiliation, while approximately ** percent identified as Christians and ** percent as Buddhists. Religious population South Korea is a multi-religious society where Christianity, Buddhism, and various other religions coexist with shamanism. According to a previous study, the domestic religious population appeared to decline over time after reaching its peak in 2005, at nearly ** million people. In contrast, the share of people who are religiously unaffiliated has increased in recent years. Within the last two decades, the religiously unaffiliated population has increased from about ** percent to more than ** percent. Shamanism Shamanism has continued to significantly influence the daily lives of many South Koreans. According to a survey conducted in 2023, about ** percent of respondents reported having consulted a fortune-teller within the past year. Roughly ** percent of those respondents were already affiliated with a religion.

As of August 2025, approximately 28 percent of people in Great Britain said that they believed in a God / Gods, compared with 38 percent who had no belief in God / Gods at all.