IDS 2201: Catholic and Benedictine Intellectual Traditions: Data on Religion

Provides statistical and survey data on "churches and church membership, religious professionals, and religious groups." Summary datasets for specific countries all over the world is also available.

From the Hartford Institute of Religion Research, this site provides a collection of links to a variety of religious data.

The Association of Religion Data Archives (ARDA) strives to democratize access to the best data on religion. Founded as the American Religion Data Archive in 1997 and going online in 1998, the initial archive was targeted at researchers interested in American religion. The targeted audience and the data collection have both greatly expanded since 1998, now including American and international collections and developing features for educators, journalists, religious congregations, and researchers.

Pew Research Center is a nonpartisan fact tank that informs the public about the issues, attitudes and trends shaping America and the world. They conduct public opinion polling, demographic research, content analysis and other data-driven social science research.