How many Jews are there in the world? That's a difficult question to answer, because not every country keeps track of such things, and not every Jew chooses to admit such things, particularly in countries where Jews are persecuted.
Most estimates I have seen suggest that there are about 13-14 million Jews in the world. The vast majority of these Jews live in either the United States and Israel, each with approximately 5 million Jews. There are less than 2.5 million Jews in Europe, 1 million in Latin America and 300,000 in Canada. In Africa, there are only 165,000 Jews, nearly half of whom live in the country of South Africa. There are less than 100,000 Jews in Australia and New Zealand combined.
For more information about world population by religion, see the following sites: