Religions by Proportion of Population

I found the information below to be interesting and informative.

I’ve listed the categories of people belonging to the three most popular monotheistic faiths  (Christianity, Islam, Judaism) and the countries with the greatest proportion of each. I’ve also included countries with Irreligious/Atheistic beliefs, as these represent the third largest belief-system on the planet; behind Christians (2.1 billion people) and Muslims (1.5 billion people) with a worldwide estimated population of (1.1 billion people). This last category also happens to be the one I belong to. TGO

Source: Wikipedia

Christians:

Countries with the greatest proportion of Christians (as of 2008):

1. Vatican City 100% (100% Roman Catholic)
2. Federated States of Micronesia ~100%
3. Samoa ~100%
4. Panama ~ 100%
5. Romania 99%
6. East Timor 99% (90% Roman Catholic)
7. Bolivia 98.1% (95% Roman Catholic)
8. Venezuela 98% (mostly Roman Catholic)
9. Marshall Islands 97.2%
10. Peru 97.1%
11. Paraguay 96.9% (mostly Roman Catholic)
12. Papua New Guinea 96.4%
13. Kiribati 96%
14. Angola +95%
15. Barbados +95%
16. Cyprus 95%(mostly Greek Orthodox)
17. Mexico 95% (mostly Roman Catholic)
18. Malta 95%
19. Colombia 93.5% (mostly Roman Catholic)
20. Guatemala +90% (50-60% Roman Catholic and ~40% Protestant, 0-10% non-Christian)

Muslims:

Countries with the greatest proportion of Muslims (as of 2008):

1. Yemen 99.9% (65-70% Sunni, 30-35% Shi’a)
2. Mauritania 99.9% (mostly Sunni)
3. Somalia 99.9% (mostly Sunni)
4. Maldives 99.33% (mostly Sunni)
5. Oman 99% (mostly Ibadhi)
6. Djibouti +99% (mostly Sunni)
7. Afghanistan 99% (80% Sunni, 19% Shi’a)
8. Tunisia 99% (mostly Sunni)
9. Algeria 99% (mostly Sunni)
10. Turkey 99% (85% Sunni, 15% Shia)
11. Bahrain 98% (mostly Shia)
12. Comoros 98% (mostly Sunni)
13. Morocco 98.7% (mostly Sunni)
14. Niger +98% (95% Sunni and Sufi)
15. Iran 98% (mostly Shi’a)
16. Pakistan 97% (75-80% Sunni, 20-25% Shi’a)
17. Iraq 97% (65% Shi’a, 35% Sunni)
18. Libya 97%
19. Azerbaijan 96% (mostly Shia)

Jews:

Countries with the greatest proportion of Jews (as of 2007):

1. Israel 76.2%
2. Palestinian territories 11.09%
3. Monaco 3%
4. United States 2.5%
5. Gibraltar 2.1%
6. Cayman Islands 1.71%
   
7. Netherlands Antilles^ 1.3%
8. Canada 1.1%
9. France 1%
10. Belarus 1%
11. Argentina 0.8%
12. Hungary 0.8%
13. Uruguay 0.75%
14. Russia 0.5%
15. United Kingdom 0.5%
16. Australia 0.45%
17. Netherlands 0.3%
18. Germany 0.25%
19. Georgia 0.22%

^: As of 2010, no longer exists as a country.

Irreligious & Atheists:

Countries with the greatest proportion of people without religion (including Agnostics and Atheists) (as of 2007):

1. Japan 64–84% (74%)
2. Sweden 46-85% (65.5%)
3. Denmark 43-80% (61.5%)
4. Macau 60.9%
5. Czech Republic 54–61% (57.5%)
6. Hong Kong 57%
7. France 43-64% (53.5%)
8. Norway 31–72% (51.5%)
9. Estonia 49%
10. Netherlands 39-55% (47%)
11. Finland 28–60% (44%)
12. United Kingdom 31–52% (41.5%)
13. South Korea 30-52% (41%)
14. Germany 25-55% (40%)
15. Hungary 32-46% (39%)
16. Belgium 42-43% (38.75%)
17. New Zealand 34.7%
18. Bulgaria 34-40% (37%)
19. Slovenia 35-38% (36.5%)
20. Russia 13–48% (30.5%)