In 2012, they are Israel, United States, France, Canada, United Kingdom, Russia, Argentina, Germany, Australia, Brazil.
Note: The above countries have the highest quantities of Jews (period), but it is not necessarily the case (although very likely) that they have the largest numbers of religious Jews.
As of 2017:
Israel.......... 6,450,000
America....... 5,400,000
France......... 465,000
Canada........ 385,000
United Kingdom 270,000
Argentina.... 205,000
Russia........ 185,000
Australia...... 112,500
Germany......100,000
Brazil............ 95,000
South Africa.. 70,000
Ukraine......... 63,000
Mexico.......... 53,000
Hungary........ 48,000
Belgium........ 30,000
Spain.............30,000
Holland......... 29,900
Poland...........25,000
Italy.............. 28,000
Switzerland..19,000
Chile............. 18,500
Turkey...........17,200
Sweden.........15,000
Uruguay........14,500
Belarus..........11,500
Panama, Romania, Austria...10,000 each
All other countries, combined.... 125,000.
See also:
About 78% of the Jews in the occupied or war impacted parts of Europe were killed in the Holocaust (also called The Shoa). In some countries, such as Poland and Lithuania, 90% of the Jews died or were killed.
There are 22 Arab countries and 1 Jewish country.
Auschwitz.
Europe
which countries have the most ICBM's
Asia.
62
Russia, and China both border 14 other countries.
Christianity. The highest number of rapes reported are from christian majority countries and by christian offenders.
All over the world. I understand that India, Iran and the United States have significant number of believers, but there are Bahá'ís (that is, believers in the Bahá'í Faith) in all other countries as well.
under15.
Some countries that have a relatively large number of Bahá'í believers include Iran (where Bahá'ís are currently subject to a lot of persecution), the United States, India, Bolivia.