Websites targeting keyword church membership statistics

The 2010 U.S. Religion Census: Religious Congregations & Membership Study (RCMS) provides country-level demographic data on religious bodies in America.

Adherents.com is a growing collection of church membership and religion adherent statistics. Over 44,000 statistics for over 4,300 faith groups from all world religions, major religions and most minor religions, listing number of adherents, number of congregations, and number of countries. Includes both world totals and regional/country breakdowns.

The ARDA provides free access to the most authoritative religion statistics, data and church membership reports from around the world, including Christian statistics and adherents data. The ARDA offers recent U.S. and international survey findings, local, national and global profiles of religion, and detailed demographic reports and maps of religious and protestant denominations in America. Relying on an archive of over 500 data collections, the Association of Religion Data Archives provides online tools and resources for educators, religious congregations, researchers, journalists, and anyone interested in religion statistics and data.

Ground breaking research of church attendance of over 200,000 churches in the United States.