Organizers
- Chesnutt Park
- Chess Tutors After School Programs
- Chess Tutors Grand Match Gala
- Chess4Life
- Chester Bowl Improvement Club
- Chester County Running Store
- Chester Washington G.C.
- Chesterfield County Parks and Recreation
- Chesterfield County Public Schools
- Chesterfield County Public Schools Adult Continuing Education
- Chesterfield Public Education Fund
- Chestertown Lions Club
- Chestnut Springs Dolphins
- Chestnut Tree House
- Cheyenne Greenway Foundation
- Cheyenne Shadows GC @ Fort Carson
- Cheyenne Sunrise Lions Club
- Chhandam School of Kathak
- Chi Omega-Psi Mu Chapter
- Chi Running - Tri Tek Camps
- CHI St. Alexius Health Dickinson Foundation
- Chicago Area Runners Association (CARA)
- Chicago Bandits
- Chicago Center for Music Education
- Chicago Children's Choir
- Chicago Childrens Clinic
- Chicago Corner Church
- Chicago Executive Airport
- Chicago Futsal Academy
- Chicago Lakefront Soccer Club
- Chicago Multi-Cultural Dance Center
- Chicago Park District
- Chicago Players Club
- Chicago Running and Special Events Management, Inc
- Chicago School of Musical Arts
- Chicago Sport and Social Club
- Chicago White Sox
- Chicago Winter Bike Swap
- Chicago Yacht Academy
- Chicagoland Chapter of the Hutchinson Bell
- Chicagoland FCBC
- Chickasaw Country Club
- Chicks Love Dancing LLC
- Chico Area Recreation and Park District
- Chico Creek Nature Center
- Chico Softball Little Leage
- Chico State Athletics
- Chicopee Chargers Youth Sports Parent Organization
- Chicopee Woods Golf Course
- Chicopee Youth Football Association
