The National Congregations Study surveys a representative sample of America's churches, synagogues, mosques and other local places of worship. Initiated in 1998, the NCS gathers information about a wide range of characteristics and activities of congregations. With 1331 participating congregations across the United States, the 2012 National Congregations Study is a nationally representative survey of regularly gathering religious groups. The congregations who participated in Wave III of the NCS survey represent over 70 Christian denominations as well as Jewish, Muslim, Buddhist, and other religious groups. Based on an in-depth interview of congregational leaders, the survey documents the worship, programs, staffing, and other characteristics of American congregations. The 2012 NCS is the third wave of the study since 1998, and therefore also helps us document change and continuity over time.