The World Values Survey investigates values and cultural changes in societies all over the world. A variety of questions on religion and morality are included. Registration is required to access data files. Online anlysis options are available.
Publications based on this survey that discuss religion include:
Religion in American Culture: U.S. Religious Landscapes Survey
Based on interviews with more than 35,000 American adults, this extensive survey details the religious makeup, religious beliefs and practices as well as social and political attitudes of the American public. A full report is available online. Also available are interactive tools on affiliations, maps, portraits of religious groups, and comparisons.
The American Religious Identification Study (ARIS) is a nationally representative survey of U.S. adults in the 48 contiguous states. Three waves of the survey were conducted in 1990, 2001, and 2008.
The American National Election Studies (ANES) produces high quality data on voting, public opinion, and political participation to serve the research needs of social scientists, teachers, students, policy makers and journalists who want to better understand the theoretical and empirical foundations of national election outcomes.
The surveys include questions on religion. For quick stats look in the Guide to Public Opinion for Social & Religious Characteristics of the Electorate.
The National Study of Youth and Religion is a research project directed by Christian Smith, Professor in the Department of Sociology at the University of Notre Dame and Lisa Pearce, Assistant Professor of Sociology at the University of North Carolina at Chapel Hill. This project, generously supported by Lilly Endowment Inc., began in August 2001 and is currently funded through December 2010.
This website includes reports and questionarres. Also valuable is a list of link to additional youth surveys with questions about religion.