Irreligion in Turkey

Irreligion in Turkey refers to the extent of the lack, indifference to or rejection of religious faith in the country. Based on surveys, Islam is the predominant faith and irreligious people form a minority in Turkey, although precise estimates of the share of deists, atheists, agnostics and other unaffiliated people in the population vary. One study in Turkey reported that 95% believe in God while 75% are religious. Another study, done by a French company which interviewed 17,180 adults across 22 countries, stated that atheists accounted for 7% of those who were interviewed from Turkey while agnostics accounted for 3%. 
It is difficult to quantify the number of atheists or agnostics in Turkey, as they are not officially counted in the census of the country. The data also suggests that 85% of all irreligious people are younger than 35. There is a great stigma attached to being an atheist in Turkey, so many Turkish atheists communicate with each other via the internet.
According to a poll made by MAK in 2017, 86% of the Turkish population declared they believe in God. 76% declared they believe Quran and other holy books came through revelation by God. According to a survey by the pollster KONDA, the percentage of atheists in Turkey has tripled in 10 years and rose from 1% in 2008 to 3% in 2018, while the percentage of non-believers passed from 1% to 2%. Among those aged between 15 and 29 years old, these figures rise to respectively 4% and 4%.
According to another poll made in 2019 by OPTİMAR, which interviewed 3,500 people 89.5% of those interviewed declared they believe in Islam while 4.5% identified as deists while 2.7% identified as agnostic and 1.6% as atheist. 
A survey conducted by MAK in 2020 that interviewed more than 8,000 young adults between the ages of 18 and 29 found that 82.8% of the Turkish young adults identified "as a person who has religious beliefs" while 7.7% reported they have no belief while 9.5% gave no reply and 72.7% believed in the afterlife while 11.7% did not believe in it and 15.6% gave no reply.
Another poll conducted by Gezici Araştırma in 2020 interviewed 1,062 people in 12 provinces and found that 28.5% of the Generation Z in Turkey identify as Irreligious.
An early April 2018 report of the Turkish Ministry of Education, titled "The Youth is Sliding to Deism", observed that an increasing number of pupils in İmam Hatip schools was abandoning Islam in favour of deism. The report's publication generated large-scale controversy amongst conservative Muslim groups in Turkish society. Progressive Islamic theologian Mustafa Öztürk noted the deist trend a year earlier, arguing that the "very archaic, dogmatic notion of religion" held by the majority of those claiming to represent Islam was causing “the new generations [to get] indifferent, even distant, to the Islamic worldview.” Despite lacking reliable statistical data, numerous anecdotes appear to point in this direction. Although some commentators claim the secularisation is merely a result of Western influence or even a "conspiracy", some commentators, even some pro-government ones, have come to conclude that "the real reason for the loss of faith in Islam is not the West but Turkey itself.
Statistics.
Belief in God and religious organizations among Turks, OPTİMAR Survey 2019:
Religiosity of Turkish people, KONDA 2018:
Among those aged between 15 and 29 years old:
Among those aged between 15 and 20 old:
Organisation.
Association of Atheism ("Ateizm Derneği"), the first official atheist organisation in Middle East and Caucasus, was founded in 2014. In 2018 it was reported in some media outlets that the Ateizm Derneği would close down because of the pressure on its members and attacks by pro-government media, but the association itself issued a clarification that this was not the case and that it was still active.