- S. H. Cowell Foundation
- San Francisco Department of Children, Youth and Their Families
- San Francisco Foundation
- Sara H. and William R. Kimball Foundation
- Searle Funds at the Chicago Community Trust
- Sidney E. Frank Foundation
- St. Charles Youth & Family Services Foundation
- Stockton Rush Bartol Foundation
- Stuart Foundation
- Surdna Foundation
- The Boston Foundation
- The Wallace Foundation
- Thomas S. Kenan Institute for the Arts
- Travelers Foundation
- U. S. Department of Education
