01As of 2023, approximately 2.38 billion people worldwide identify as Christians, representing 31% of the global population, according to Pew Research Center's analysis of census data and surveys
02In 2020, Muslims numbered about 1.9 billion globally, comprising 24% of the world's population, with projections to reach 2.8 billion by 2050 per Pew Research
03Hindus constitute around 1.2 billion people or 15% of the world population as of 2023, primarily concentrated in India, based on UN Population Division data
04Buddhists total approximately 500 million worldwide, or 6-7% of global population in 2023, with majorities in Southeast Asia, per World Religion Database
05The religiously unaffiliated (nones) number about 1.2 billion or 16% globally in 2023, growing fastest in Europe and North America, according to Pew Forum
06Folk religions followers stand at 430 million or 6% worldwide in 2023, including African traditional religions and Chinese folk practices, per Pew Research
07Jews number around 15 million globally or 0.2%, with 45% in Israel and 40% in the US as of 2023, from World Jewish Population survey
08Sikhs total 25-30 million worldwide, mostly in India (20 million), per 2023 Indian Census projections
09By 2050, Muslims are projected to nearly equal Christians at 2.8 billion each, making up 30% vs 31% of world population, Pew Research forecast
10Sub-Saharan Africa will have 1.1 billion Christians by 2050, up from 517 million in 2010, driving global Christian growth, per Pew
11Asia-Pacific region holds 62% of world's Hindus (900 million) and 99% of Buddhists (488 million) in 2023, UN data
12Europe's Christian population declined from 75% in 2010 to projected 65% by 2050, with nones rising to 26%, Pew Research
13North America's religiously unaffiliated rose from 16% in 2007 to 29% in 2021 among adults, Gallup/Pew combined analysis
14Latin America had 531 million Christians in 2023 (90% of population), but Protestantism growing at 1.5% annually, Pew
15Middle East-North Africa's Muslims are 93% of 341 million people in 2023, with minimal growth in minorities, Pew
16Global fertility rate for Muslims is 2.9 children per woman vs 2.6 for Christians in 2023, contributing to faster growth, UN/Pew
1784% of world population identifies with a religion in 2023, down slightly from 86% in 2010 due to secularization, World Religion Database
18India has 1.1 billion Hindus (79.8% of 1.4 billion population) per 2023 estimates, Census of India
19Indonesia's 240 million Muslims make it the largest Muslim-majority country at 87% in 2023, BPS Indonesia
20Brazil has 180 million Christians (88%) in 2023, with 65% Catholic and 23% Protestant, IBGE Brazil
21Nigeria's 100 million Christians (50%) and 95 million Muslims (49%) in 2023, split evenly, Pew estimates
22China's 21 million Christians (1.5%) growing at 7% annually underground churches, 2023 Gordon-Conwell
23Iran's 99.4% Muslim population includes 90-95% Shia in 2023, CIA World Factbook
24Japan's 0.5% Christians (600,000) amid 70% unaffiliated in 2023, Agency for Cultural Affairs Japan
25Global Jewish population grew 0.63% annually to 15.7 million in 2023, American Jewish Year Book
26Thailand's 93% Buddhists (65 million) with Theravada majority in 2023, National Statistical Office Thailand
27South Africa's 80% Christians include 50% Protestant in 2023 census, Stats SA
28Australia's nones at 39% in 2021 census, highest in G20, ABS Australia
29Philippines 86% Catholic (92 million) in 2023, PSA Philippines
30World’s 430 million folk religionists include 400 million in China (ethnic religions) in 2023, Pew