Immigrant religiosity has recently become a hot topic both in academia and in the public arena. For years, a debate has existed as to whether there is an increase or decrease of immigrant religious participation surrounding the migratory event. Some argue that the act of migration spurs an increase in immigrant religious participation, while others contend that migration is a disruptive event and decreases immigrant religious participation. In addition to contextual factors, a number of micro-level factors may explain this change in religious participation: sex, family composition, religious affiliation, and employment status. This article uses longitudinal data from Quebec, Canada surveying nearly 1,000 immigrants during the 1990s. Results indicate that immigrant religious participation decreases substantially as compared to the average level of religious participation among the same immigrants prior to their migration. Besides religious affiliation, most of the micro-level factors hypothesized to explain this change in religious participation prove statistically insignificant. The lack of significant results for micro-level factors points to environmental factors that may be at work.With recent attention in the press given to immigrants and their religious involvement, the intersection of religion and immigration has become an important topic to the public and academia alike (Dickey 2005;Heinrich 2007;Hirschman 2004;Redmand 2003;Wuthnow 2003). This has resulted in a sharp increase of dissertations, monographs, and articles surrounding the topic of immigrant religiosity. Both quantitative and qualitative studies have focused on, or at the very least allude to, the increase or decrease of immigrant religious participation surrounding the migratory event and ensuing resettlement (Alanezi 2005;Ebaugh and Chafetz 2002; van Tubergen 2006;Warner 1998). When studying immigrant religious adaptation, obvious questions emerge: Does immigrant religious participation increase or decrease upon entry into the new society? Does this apparent change in religious participation vary among certain demographic groups of immigrants? What influence does the immigrant's religious affiliation have in altering an immigrant's religious participation over time? The answers to these questions are not only of interest to academics, but also of concern to policymakers and immigrant service providers as well.Within the literature, there is a theoretical debate as to how immigrants religiously adapt in the new society. The differing viewpoints are based on a variety of studies and theoretical propositions. On the one hand, some scholars hold that the act of migration is a "theologizing" experience (Smith 1978) that actually increases the immigrant's spiritual consciousness and consequently religious participation (Hagan and Ebaugh 2003;Warner 1998). It is reasoned that immigrants become more reliant on the supernatural during the unstable months of the migratory event and resettlement. Of course, it is always difficult to know the direction of...