Clearinghouse for scholarly data about religions worldwide. In the "International" section, "National Profiles" examine the religious composition, religious freedoms, demographics, constitutional clauses, survey findings and multiple social and political measures for 250 nations.
The Pluralism Project was developed by Diana L. Eck at Harvard University to study and document the growing religious diversity of the United States, with a special view to its new immigrant religious communities.
Source for religious data at the county level. Reports the number of congregations in every U.S. county equivalent for each of 236 faith groups. Also includes a list of "Religion & Congregational Research Links"
Research-based center which present summaries of current religion research (studies, polls, statistics) by Hartford Institute for Religion Research faculty as well as the research done by other sociologists of religion.