Funders
- Capital One Foundation
- Cargill Foundation
- Carilion Foundation
- Caring for Colorado Foundation
- Caring Place, City of Portage
- Carnegie Corporation of New York
- Carnegie Foundation for the Advancement of Teaching
- Carnegie UK Trust
- Carolan K. Stiles
- Carsey Institute's Endowment
- Carsey School of Public Policy at The University of New Hampshire
- Carter & Melissa Cafritz Trust
- Case Foundation
- Case Western Reserve University
- Casey Family Programs
- Catholic Charities Archdiocese of Boston
- Catholic Sisters Initiative, Conrad N. Hilton Foundation
- CDC
- Cedar Tree Foundation
- Celgene Corporation
- Center for Civil Rights Remedies
- Center for Community Change
- Center for Economic Progress
- Center for Evaluation Innovation
- Center for Information and Research on Civic Learning and Engagement (CIRCLE)
- Center for Integrated Agricultural Systems
- Center for Nonprofit Excellence at the United Way of Central New Mexico
- Center for Retirement Research
- Center for Social Media
- Center for Urban and Regional Affairs at University of Minnesota
