I recently encountered a discussion about which countries are the most and least religious. This post presents some comprehensive results for the year 2020 based on my earlier analyses of global, regional and country-level trends in religious belief and practice, and the prevalence of atheism (see earlier posts here, here, and here). These analyses used data for 110 countries from the World Values Survey (WVS) and the European Values Study (EVS), covering the period 1981 to 2020 [1-3]. In previous analyses, I defined four religiosity categories as follows:
Practicing religious person: A religious person who believes in God* and is practicing**, OR a non-religious person who believes in God, is practicing, and rates the importance of God in the top 5 points of a 10 points scale.
Non-practicing religious person: A religious person who believes in God and is non-practicing OR a non-religious person who believes in God, is non-practicing, and rates the importance of God in the top 6 points.
Non-religious: A non-religious person who believes in God but rates the importance of God as any of three points at the not important end of a 10-point scale.
Atheist: A “confirmed atheist” and/or does not believe in God
Respondents were classified as “practicing” if they attend religious services or pray to God outside of religious services at least once a month. I assigned all people who do not believe in God to the atheist category. This will include some religious people who practice non-theist religions such as Buddhism.
For this post, I decided to move the atheists who said they practiced religion at least once a month to the “practicing religious person” category. In most of the regions where the prevalence of atheism was high, the percent of atheists who are practicing religious is small, at most a few percent. Its likely these are regions where there is no stigma or danger in being atheist, and the few percent practicing are likely attending religious services with other family members who are religious. In regions where the prevalence of atheism is very low, the proportion of atheists who attend religious services is generally much higher (30-40%), almost certainly reflecting stigma and danger in being openly atheist.
I moved the proportion of atheists who are practicing religious to the practicing religious category for the maps below. This adjustment makes little difference to the results. The first map shows the global variations in the proportion of country populations who are practicing religious.
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