| Country | Predominant Religion(s) (approximate majority if applicable) | Estimated Atheist Percentage (range from various sources) | Significant Minority Religions |
| Switzerland | Christianity (Catholic & Protestant, approx. 60-70% total) | ~20-23% | Islam, Irreligion |
| Norway | Christianity (Protestant, Church of Norway, approx. 60-70%) | ~12-70% (wide range across surveys) | Islam, Irreligion, Other Christian |
| Iceland | Christianity (Evangelical Lutheran Church, approx. 60-70%) | ~4-54% (wide range across surveys) | Irreligion, Other Christian |
| Hong Kong | Chinese Folk Religions, Buddhism, Taoism, Christianity | ~13-66% (high percentage of unaffiliated) | Islam, Hinduism |
| Denmark | Christianity (Evangelical Lutheran Church, approx. 70-80%) | ~12-68% (wide range across surveys) | Islam, Irreligion, Other Christian |
| Sweden | Christianity (Church of Sweden, Lutheran, approx. 50-60%) | ~29-78% (high percentage of unaffiliated) | Islam, Irreligion, Other Christian |
| Ireland | Christianity (Catholic, approx. 60-70%) | ~8-60% (increasingly secular) | Protestantism, Islam, Irreligion |
| Germany | Christianity (Protestant & Catholic, approx. 50-60% total) | ~12-66% (significant increase in irreligion) | Islam, Irreligion, Other Christian |
| Singapore | Buddhism, Christianity, Islam, Taoism, Hinduism | ~10% (significant percentage of "no religion") | |
| Netherlands | Christianity (Catholic & Protestant, approx. 30-40% total) | ~14-44% (high percentage of unaffiliated) | Islam, Irreligion |