Organizers
- CSUDH BASKETBALL
- CSUDH SOCCER
- CSUF Army ROTC
- CSUN Women's Basketball Foundation
- CSz Theater Chicago
- CSz Theatre Chicago
- CT Audubon Society, Inc.
- CT Cycling Advancement Program
- CT Science Center
- CT Veterans Day Patriot Race
- CTC Tennis
- CU Little League
- C-U Marathon, LLC
- CU Science Discovery
- Cub Creek Inc.
- Cub Creek Science Camp / Animal Camp Jamaica
- Cub Creek Science Camp and Animal Camp Jamaica
- Cuba Little League
- Cubamerica Foundation
- Cuban American Bar Association Pro Bono Project
- Cudahy School District
- Cuero Wellness Center
- Cuesports Singapore
- Cuesta College Community Programs
- Culinaria
- Culinary Kids LLC
- Culinary U of the Triad LLC.
- Cullen's Archangel RescuE, Inc
- Cullman City Parks & Recreation
- Culpeper County Parks and Recreation Department
- Culpeper Festival Committee
- Culpeper Sheriff's Charitable Fund, Inc.
- Cultivating a Lifetime of Legacy
- Cultural Arts Alliance of Walton County, Inc
- Cultural Center of Cape Cod
- Culture & Heritage Alliance/ Loving Hands International
- Culture Collective Camps
- Culture Shock DC
- Cumberland Tourist Commission
- Cumberland Valley Cycling Club
- Cupcake Run
- Cupertino FC Soccer Club
- Cupertino Little League
- Cupertino Soccer Club
- Cupertino Sports and Education Inc
- Cures Through Caring
- CureSearch for Children's Cancer
- CuriOdyssey
- Custer Hill Golf Course
- Cut Above Productions LLC
