This study examines cross-national differences in the religiosity of immigrants in Europe utilizing three different measures of religiosity: religious attendance, praying, and subjective religiosity. Hypotheses are formulated by drawing upon a variety of theories—scientific
worldview, insecurity, religious markets, and social integration. The hypotheses are tested using European Social Survey data (2002–2008) from more than 10,000 first-generation immigrants living in 27 receiving countries. Multilevel models show that, on the individual level, religiosity
is higher among immigrants who are unemployed, less educated, and who have recently arrived in the host country. On the contextual level, the religiosity of natives positively affects immigrant religiosity. The models explain about 60 percent of the cross-national differences in religious
attendance and praying of immigrants and about 20 percent of the cross-national differences in subjective religiosity.