List of countries by irreligion

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, panentheism, and New Age, varies in the countries around the world. According to reports from the WIN/Gallup International's (WIN/GIA) four global polls: in 2005, 77% were a religious person and 4% were "convinced atheists"; in 2012, 23% were not a religious person and 13% were "convinced atheists"; in 2015, 22% were not a religious person and 11% were "convinced atheists"; and in 2017, 25% were not a religious person and 9% were "convinced atheists".

Source: Wikipedia — List of countries by irreligion (CC BY-SA 4.0)