The largest amount of Christians in a single Country is the United States

However, this does not mean that our country is ONLY Christian because other countries (the percentage of people who are Christian are higher). In the U.S. we just have the largest concentration of Christians in a single country by number. This is one reason 9-11 happened when Osama Bin Laden was trying to create a religious war between Christians and Muslims worldwide. Luckily, he did not succeed in this but financially this was not good for the U.S. or the rest of the Free (and mostly Christian)  part of the world.

 

Christians

Countries with the greatest proportion of Christians from Christianity by country (as of 2010):

Christianity – Percentage by country

1.   Vatican City 100% (100% Roman Catholic)
2.  Pitcairn Islands 100% (100% Seventh-day Adventist)^[6]
3.  Samoa ~99%^[7]
4.  Romania 99% (mostly Romanian Orthodox)
5.  American Samoa 98.3%^[8]
6.  Malta 98.1%^[9] (mostly Roman Catholic)
7.  Venezuela 98%^[10] (96% Roman Catholic)
8.  Greece 98% ^[11] (95% Greek Orthodox)
9.  Marshall Islands 97.2%^[12]
10.  Tonga 97.2%^[13]
11.  San Marino 97%^[14] (~97% Roman Catholic)
12.  Paraguay 96.9%^[15] (mostly Roman Catholic)
13.  Peru 96.5%^[16] (mostly Roman Catholic)
14.  El Salvador 96.4%^[17]
15.  Kiribati 96%^[18]
16.  Federated States of Micronesia ~96%^[19]
17.  Barbados 95.1%^[20]
18.  Papua New Guinea 94.8%^[21]
19.  East Timor 94.2%^[22][23]
20.  Armenia 93.5%^[24] (mostly Armenian Orthodox)

Muslims