Trends and patterns of religious mobility have played a central role in theoretical controversies in thesociology ofreligion. Early examinations focused onhowsocial status mightmotivate religious switching, and recently scholars have claimed thatdiminishing status differences between denominations have opened denominational boundaries and led tohigher rates ofreligious mobility. Scholars workingfrom rational actor perspectives have generated several hypotheses. First, human capital andadaptive preference theories suggest that switching willremain infrequent, and willtend to occur between similar denominations. Second, "strict church" perspectives argue that demanding sectarian denominations willhave higher retention, and bemore attractive destinations. Third, marketniche perspectives argue that niche overlap willfoster high rates of religious mobility. Finally, theories emphasizing normative constraints onreligious choices suggest that quasi-ethnic religious groups will have a greater holdon members. This article examines trends andpatterns of religious mobility in the u.s. between 1973 and 1998 using data from the General Social Surveys. Retention rates, distributions of original and destination affiliations, and mobility tables are compared across three periods, and four broad cohorts using log-multiplicative association models. I find some support for hypotheses generated bystatus theories, andforseveral propositions from rational actor theories, however thedecline ofdenominationalism perspective isunsupported.In the U.S., individuals are relatively free to choose religious affiliations, and consequently religious mobility is not uncommon. The fluidity of attachments to religious institutions in the u.S. has been noted by a number of social >I-