Chronicle of Philanthropy: Facts and Figures This site provides links to surveys conducted by The Chronicle of Philanthropy and to Chronicle articles that report on studies on philanthropy that are conducted by other organizations.
NOZA "World's largest database of charitable donations." This is a fee based service, however, they give you a free 24 hour trial.
National Center for Charitable Statistics: A project of the center on nonprofits and philanthropy at the Urban Institute. The National Center for Charitable Statistics (NCCS) is the national repository of data on the nonprofit sector in the United States. Its mission is to develop and disseminate data on nonprofit organizations and their activities for use in research on the relationships between the nonprofit sector, government, the commercial sector, and the broader civil society. The Center was established in 1982. Working closely with the IRS and other government agencies, private sector service organizations, and the scholarly community, NCCS builds compatible national, state, and regional databases and develops uniform standards for reporting on the activities of charitable organizations.