This is a list of religious populations by number of adherents and countries.

thumb|A map of the world, showing the major religions distributed in the world as of today

Current world estimates

Pew Research Center published in 2025 an estimation of the proportions of the major religious groups in 2020.]]

By proportion

Christians

Countries and territories with the greatest proportion of Christians from Christianity by country, in 2010:

thumb|[[Christianity by country|Christian population percentage by country, June 2014.|435x435px]]

  1. 100% (100% Roman Catholic)
  2. 100% (100% Seventh-day Adventist)
  3. 99.6% (mostly Roman Catholic)
  4. ~99.0% (mostly Protestant)
  5. 98.5% (96% Oriental Orthodox)
  6. 98.3% (mostly Protestant; ARDA claim)
  7. 98.1% (mostly Roman Catholic)
  8. 98.0% (71% Roman Catholic)
  9. 98.0% (95% Eastern Orthodox)
  10. 97.2% (mostly Protestant)
  11. 97.2% (mostly Protestant)
  12. 97.0% (~97% Roman Catholic)
  13. 96.9% (mostly Roman Catholic)
  14. 96.4% (mostly Roman Catholic; ARDA claim)
  15. 96.0% (mostly Protestant)
  16. ~96.0% (mostly Protestant)
  17. 95.1% (mostly Protestant)
  18. 94.8% (mostly Protestant; ARDA claim)
  19. 94.6% (mostly Roman Catholic)
  20. 94.5% (mostly Roman Catholic)
  21. 93.0% (mostly Eastern Orthodox)
  22. 92.9% (mostly Roman Catholic)
  23. 91.1% (mostly Roman Catholic)

Muslims

Countries and territories with a considerable proportion of Muslims from Islam by country in 2010, excluding foreign workers in brackets:thumb|[[Islam by country|Muslim Percentage by country, 2020|435x435px]]

  1. 100%
  2. 99.9%
  1. 99.9%
  2. 99.8% (65% Sunni, 35% Shia)
  3. 99.7% (90% Sunni, 10% Shia)
  4. 99.5%
  5. 99.2% (55% Shia, 45% Sunni)
  6. 99.0% (60% Shia, 40% Sunni)
  7. 98.3%
  8. 98.0%
  9. 97.9%
  10. 97.2% (90% Sunni, 10% Shia)
  11. 96.9%
  12. 96.4% (85% Sunni, 12% Shia, 3% Other)
  13. 96.3%

thumb|[[Irreligion by country|Nonreligious population by country in 2010.|435x435px]]

  1. 78.4%
  2. 71.3%
  3. 60.2%
  4. 60.0%
  5. 54.7%
  6. 51.8%
  7. 46.6%
  8. 45.3%
  9. 44.3%
  10. 41.5%
  11. 39.6%
  12. 36.5%
  13. 31.9%
  14. 31.2%
  15. 31.0%
  16. 29.9%
  17. 29.0%
  18. 28.6%
  19. 28.6%
  20. 28.0%
  21. 26.7%
  22. 26.3%
  23. 24.5%
  24. 23.2%
  25. 22.8%
  26. 21.0%
  27. 20.8%
  28. 20.3%
  29. 19.4%
  30. 18.8%

Data is ranked by mean estimate in parentheses. Irreligious includes agnostic, atheist, secular people, and those having no formal religious adherence. It does not necessarily mean that those of this group don't belong to any religion. Some religions have harmonized with local cultures and can be seen as a cultural background rather than a formal religion. The practice of officially associating a family or household with a religion, while not formally practicing the affiliated religion, is common in many countries. Thus, over half of this group is theistic and/or influenced by religious principles, but nonreligious/non-practicing and not true atheists or agnostics. See Spiritual but not religious.

Hindus

Countries with the greatest proportion of Hindus from Hinduism by country in 2010:

thumb|435x435px|[[Hinduism by country|Hindu population by country in 2010]]

  1. 81.3%
  2. 79.8%
  3. 48.54%
  4. 27.9%
  5. 25.0%
  6. 24.8%
  7. 22.3%
  8. 18.2%
  9. 15.0%
  10. 12.6%
  11. 12.0%
  12. 9.6%
  13. 8.1%
  14. 6.7%
  15. 6.3%
  16. 5.1%
  17. 3.0%
  18. 2.6%
  19. 2.2%
  20. 2.1%
  21. 1.7%
  22. 1.7%
  23. 1.5%
  24. 1.4%
  25. 1.2%
  26. 0.7%

Buddhists

Countries with the greatest proportion of Buddhists from Buddhism by country in 2010:

thumb|435x435px|[[Buddhism by country|Buddhist population by country in 2010]]

  1. 96.9%
  2. 93.2%
  3. 80.1%
  4. 74.7%
  5. 69.3%
  6. 66.0%
  7. 55.1%
  8. 36.2% - 66.7%
  9. 35.1%
  10. 33.2%
  11. 22.9%
  12. 19.8%
  13. 18.2%
  14. 17.3%
  15. 16.4%
  16. 13.2%
  17. 10.6%
  18. 10.3%
  19. 8.6%
  20. 3.1%
  21. 2.8%
  22. 2.7%
  23. 2.5%
  24. 2.0%
  25. 1.6%
  26. 1.5%
  27. 1.2%
  28. 1.1%

Chinese traditional religionists

As a spiritual practice, Taoism has made fewer inroads in the West than Buddhism and Hinduism. Despite the popularity of its great classics the I Ching and the Tao Te Ching, the practice of Taoism has not been promulgated in America with much success. These religions are not ubiquitous worldwide in the way that adherents of bigger world religions are, and they remain primarily an ethnic religion. Nonetheless, Taoist ideas and symbols such as taijitu have become popular throughout the world through tai chi, qigong, and various martial arts.

  1. 33.0–80.0%
  2. 30.0%
  3. 28.0%
  4. 13.9%
  5. 8.5%
  6. 2.6%
  7. 0.2–1.0%
  8. 0.01–0.05%
  9. 0.05%

In 1999, the Chinese traditional religion had 184,000 believers in Latin America, 250,000 believers in Europe, and 839,000 believers in North America.

Ethnic and indigenous religionists

Indigenous statistics come from the 2009 U.S. Department of State's International Religious Freedom Act, based on the highest estimate of people identified as indigenous or followers of indigenous religions that have been well-defined. Due to the syncretic nature of these religions, the numbers may not reflect the actual number of practitioners.

  1. 35.6%
  2. 32.9%
  3. 30.9%
  4. 29.5%
  5. 25.0%
  6. 25.0%
  7. 20.0%
  8. 15.0%
  9. 15.0%
  10. 12.0%
  11. 10.5%
  12. 9.0%
  13. 9.0%
  14. 8.5%
  15. 5.0%

Sikhs

Countries with the greatest proportion of Sikhs:

thumb|435x435px|[[Sikhism by country]]

  1. 2.12%
  2. 1.72%
  3. 1.10%
  4. 0.88%
  5. 0.88%
  6. 0.83%
  7. 0.75%
  8. 0.56%
  9. 0.37%
  10. 0.35%

The Sikh homeland is the Punjab state, in India, where Sikhs make up approximately 58% of the population. This is the only place where Sikhs are in the majority. Sikhs have emigrated to countries all over the world – especially to English-speaking and East Asian nations. In doing so they have retained, to an unusually high degree, their distinctive cultural and religious identity.

Sikhs are not ubiquitous worldwide in the way that adherents of larger world religions are, and they remain primarily an ethnic religion. They can be found in many international cities and have become an especially strong religious presence in the United Kingdom and Canada. Sikhism is the fastest growing religion in New Zealand and Australia.

Spiritists

The data come from ARDA if no other specific source is provided.

  1. 10.3%
  2. 10.2%
  3. 3.6%
  4. 2.7%
  5. 2.2%
  6. 1.9%
  7. 1.8%
  8. 1.5%
  9. 1.4%
  10. 1.3%
  11. 1.1%
  12. 1.0%
  13. 1.0%
  14. 0.9%
  15. 0.7%
  16. 0.5%
  17. 0.5%
  18. 0.4%
  19. 0.2%
  20. 0.2%

Jews

Countries with the greatest proportion of Jews in 2017:

thumb|435x435px|[[Jewish population by country in 2020]]

  1. 73.60%
  2. 2.00%
  3. 1.76%
  4. 1.07%
  5. 0.70%
  6. 0.485%
  7. 0.483%
  8. 0.47%
  9. 0.44%
  10. 0.41%
  11. 0.36%
  12. 0.259%
  13. 0.25%
  14. 0.24%
  15. 0.22%
  16. 0.17%
  17. 0.154%
  18. 0.154%
  19. 0.152%
  20. 0.14%
  21. 0.124%
  22. 0.124%
  23. 0.122%
  24. 0.112%
  25. 0.11% (details)
  26. 169,213,130
  27. 114,198,444
  28. 106,204,560
  29. 80,510,000
  30. 78,790,000
  31. 67,070,000
  32. 44,502,000
  33. 41,973,000
  34. 40,243,000
  35. 39,560,000
  36. 28,436,000
  37. 28,340,790
  38. 27,365,100

Muslims

Largest Muslim populations in 2017:

  1. 238,990,000 (details)
  2. 215,000,000
  3. 209,000,000
  4. 153,000,000
  5. 117,000,000
  6. 87,500,000
  7. 82,000,000
  8. 79,850,000
  9. 48,000,000
  10. 44,000,000
  11. 41,000,000
  12. 39,000,000
  13. 38,000,000
  14. 33,000,000
  15. 33,648,090
  16. 30,000,000
  17. 28,000,000
  18. 25,000,000
  19. 22,000,000
  20. 22,000,000

Irreligious and atheists

Largest religiously unaffiliated populations in 2020:

  1. 1,120,000,000
  2. 28,600,000
  3. 14,274,430
  4. 4,640,000
  5. 4,400,000
  6. 3,090,000
  7. 2,510,000
  8. 1,940,000
  9. 1,239,610
  10. 1,030,000
  11. 890,000
  12. 682,302
  13. 665,820
  14. 610,000
  15. 440,000
  16. 410,000
  17. 403,570
  18. 380,000
  19. 360,000
  20. 330,000
  21. 310,000
  22. 200,000
  23. 190,000
  24. 120,785
  25. 120,000

Buddhists

Largest Buddhist populations in 2020.

  1. 67,620,000
  2. 53,380,000
  3. 47,210,000
  4. 46,990,000
  5. 22,580,000
  6. 16,240,000
  7. 15,700,000
  8. 9,850,000
  9. 9,550,000
  10. 6,400,000
  11. 3,800,023
  12. 2,062,000
  13. 1,001,974
  14. 670,000
  15. 660,000
  16. 630,000
  17. 580,000
  18. 520,000
  19. 470,000
  20. 400,000

Sikhs

Largest Sikh population in 2023

  1. 23,786,000