ARDA (Association of Religion Data Archives) contains a wide variety of statistical data, historical timelines, tools for congregations, and data analysis. Supports graphing tools and mapping. 
Research in Ministry® (RIM®) is a thesis and dissertation abstract database where users can search for and share the outcomes of research conducted in programs of study related to ministry, theology and religion. 
Barna Group provides spiritual influencers with credible knowledge and clear thinking, enabling them to navigate a complex and changing culture. 
For more than 40 years, the Hartford Institute for Religion Research has a record of rigorous, applied research on religious organizations, including the study of churches, denominations, seminaries, and other religious communities. Their work is guided by a disciplined understanding of the interrelationship between the life and resources of American religious institutions and the possibilities and limits placed on those institutions by the social and cultural context in which they work. 
IPUMS (Integrated Public Use Microdata Series) provides free census and survey data from around the world integrated across time and space. IPUMS integration and documentation makes it easy to study change, conduct comparative research, merge information across data types, and analyze individuals within family and community contexts. 
Lake Institute’s Resource Library collects and curates a wide range of resources that can help deepen understanding and practice at the intersection of faith and giving. Search by keywords or browse by themes to find current research, leadership insights, inspiring stories, discernment guides, theological reflection, and more. 
The National Congregations Study surveys a representative sample of America's churches, synagogues, mosques and other local places of worship. The NCS is based on in-depth interviews with congregational leaders in 1998, 2006-2007, 2012, and 2018-2019. It gathers information about worship, programs, staffing, community activities, demographics, and many other characteristics of American congregations. 
Pew Research Center is a nonpartisan fact tank that informs the public about the issues, attitudes and trends shaping the world. It conducts public opinion polling, demographic research, media content analysis and other empirical social science research. 
PRRI (Public Religion Research Institute) is a nonprofit, nonpartisan organization dedicated to research at the intersection of religion, values, and public life. PRRI’s mission is to help journalists, opinion leaders, scholars, clergy, and the general public better understand debates on public policy issues and the role of religion and values in American public life by conducting high quality public opinion surveys and qualitative research. 
The RAND Corporation is a research organization that develops solutions to public policy challenges to help make communities throughout the world safer and more secure, healthier and more prosperous. RAND is nonprofit, nonpartisan, and committed to the public interest. 
Data.census.gov is the primary platform to access data and digital content from the United States Census Bureau. 
The Census Bureau's mission is to serve as the nation’s leading provider of quality data about its people and economy. 
The material in Studying Faith: Qualitative Methodologies for Studying Religious Communities is organized as a set of 17 frequently asked questions (FAQs) about how to apply social scientific methodologies to studying faith and religion. 