The Demographics of atheism are difficult to determine. Different people interpret "atheist" and related terms differently, and it can be hard to draw boundaries between atheism, non-religious beliefs, and non-theistic religious and spiritual beliefs. Furthermore, atheists may not report themselves as such, to prevent suffering from social stigma, discrimination, and persecution in certain regions. Despite these problems, most studies indicate that the non-religious make up about 12-15% of the world's population. (Read more...)
Shown here is the percentage in each country which responded that "they believe there is a god".
While it is difficult to quantify the prevalence of nontheism in the world, it is clear that the percentage of people in Europe who believe in god is significantly lower than most of the rest of the world. Australia, New Zealand, Canada, former and present Communist states, and to a lesser extent, the United States also show higher levels of atheism and nontheism. A 1995 survey attributed to the Encyclopædia Britannica indicates that the non-religious make up about 14.7% of the world's population, and atheists around 3.8%. (Read more...)