Association of Religion Data Archives
Contains tons of statistical and other information.
The Hartford Institute for Religion Research
Very well organized portal to religion data and sites.
Pew Forum on Religion and Public Life
A great source for surveys on religious life in America and much more.
Pew-Templeton Global Religious Futures Project
The project analyzes religious change and its impact on societies around the world.
Gallup News Topic: Religion
From the Gallup polling company, surveys and reports on the state of religion in the United States.
World Religions and Spirituality
From Virginia Commonwealth University, a collection of profiles of world religions and denominations. Look for the "Profiles" tab on top.
Wabash Center Links to Religion Resources on the Web
A very well-organized guide to all kinds of topics and links to web resources for the study of religion.
Internet Resources for the Study of Judaism and Christianity
A good collection of links, but many are out-of-date.
News, events, resources on interest to Hindus worldwide. Includes biographies of Hindu gods and goddesses.
Islam: Columbia University Libraries
A great site to start exploring and researching Islamic sources on the web.
Jewish Studies: Web Sites
From the University of Delaware Library. Good collection of solid web sites.
Resources For The Study Of Buddhism
General Buddhism information, Buddhist texts and teachings prepared by a professor at San Francisco State University.
Religion in American Culture
From the Pew Forum on Religion and Public Life. A very good and easy to use summary of religious affiliation and belief in America, June 2008.
Christian Denominations in the United States
A library guide prepared by Carolyn Cardwell of Louisville Seminary library.
Faith Communities Today
Research surveys and practical reports about congregational life, conducted and published by the Cooperative Congregations Studies Partnership, a multi-faith group of religious researchers and faith leaders.