INDEPENDENT SECTOR is a nonprofit, nonpartisan coalition of more than seven hundred national organizations, foundations, and corporate philanthropy programs, collectively representing tens of thousands of charitable groups in every state across the nation. Its mission is to promote, strengthen, and advance the nonprofit and philanthropic community to foster private initiative for the public good.

NATIONAL CENTER FOR CHARITABLE STATISTICS is the national repository of data on the nonprofit sector in the United States. Its mission is to develop and disseminate high-quality data on nonprofit organizations and their activities for use in the research sector and the broader civil society. The center, established in 1982 as part of the research division of INDEPENDENT SECTOR, has been a program of the Center on Nonprofits and Philanthropy at the Urban Institute since its transfer to the Urban Institute in July 1996.