A list of the top ten countries by largest number of Christians.

1  United States
230,000,000 71.0%

2  Brazil
175,700,000 91.4%

3  Russia
117,640,000 83.6%

4  Mexico
113,500,000 93%

5  Nigeria
92,281,000 52.8%

6  Philippines
86,500,000 85.8%

7  Congo, Democratic Republic of
68,558,000 95.6%

8  Ethiopia
54,978,000 64.5%

9  Italy
54,070,000 91.5%

10  Germany
48,400,000 59.6%

11. Vatican City
 800 100%

  12. Romania
21,490,000  99%

13.Greece
11,000,000 98%

  14. Papua New Guinea
6,860,000  99%

 15. Tonga
100,000 99%

 16.  Armenia
3,090,000 98.5%

17.Namibia
2,280,000  97.6%

 18. Marshall Islands
50,00    97.5%

19 Moldova
 3,570,000    97.5%

 20 Zambia
13,090,000   97.5%