List of countries by irreligion
Country or region WIN/GIA ( 2017 ) WIN/GIA ( 2015 ) WIN/GIA ( 2012 ) Zuckerman
Afghanistan ( details ) 9% 15%
Albania ( details ) 39% 8%
Argentina 34% 20% 26% 4-8%
Armenia 6% 5% 5% 34%
Australia ( details ) 63% 58% 58% 24-25%
Austria 53% 54% 53% 18-26%
Azerbaijan ( details ) 64% 54% 51%
Bangladesh ( details ) 19% 5%
Belgium ( details ) 64% 48% 34% 42-43%
Bosnia and Herzegovina 22% 32% 29%
Brazil ( details ) 17% 18% 14%
Bulgaria ( details ) 39% 39% 30% 34-40%
Canada ( details ) 57% 53% 49% 19-30%
China ( details ) 90% 90% 77% 8-14%
Colombia 14% 17% 15%
Countries and regions
The WIN-Gallup International Association ( WIN/GIA ) poll results below are the totals for `` not a religious person '' and `` a convinced atheist '' combined . Keysar et al . have advised caution with WIN/Gallup International figures since more extensive surveys which have used the same wording for decades and have bigger sample sizes , have consistently reached lower figures . For example , the WIN/GIA numbers from China were overestimated which in turn inflated global totals . [ 6 ]
Irreligion, which may include deism, agnosticism, ignosticism, anti-religion, atheism, skepticism, ietsism, spiritual but not religious, freethought, anti-theism, apatheism, non-belief, pandeism, secular humanism, non-religious theism, pantheism and panentheism, varies in the countries around the world. According to reports from the Worldwide Independent Network/Gallup International Association's (WIN/GIA) four global polls: in 2005, 77% were a religious person and 4% were convinced atheists while in 2012, 23% were not a religious person and an additional 13% were convinced atheists; in 2015, 22% were not a religious person and an additional 11% were convinced atheists; and in 2017, 25% were not a religious person and an additional 9% were convinced atheists. According to sociologist Phil Zuckerman, broad estimates of those who have an absence of belief in a god range from 500 to 750 million people worldwide. According to sociologists Ariela Keysar and Juhem Navarro-Rivera's review of numerous global studies on atheism, there are 450 to 500 million positive atheists and agnostics worldwide (7% of the world's population), with China having the most atheists in the world (200 million convinced atheists).