Organizers
- CityScape Adventures LLC
- CitySkouts
- citytri racing inc
- Civic Service Organization
- Civic Theatre of Greater Lafayette
- CJ Mobley Art
- CJ Paladins
- CJ Promotions
- CJM'S Events Limited
- CKF COMPETITIONS
- Clackamas Cougar Run Committee
- Clairton Unity Group
- Clare River Harriers Club
- Claremont All Star Basketball Camp
- Claremont Basketball Academy
- Claremont Elementary
- Clarendon Inc.
- Clarendon Lions Club
- Clark County Fire Fighters Assc
- Clark County Park District
- Clark Little League
- Clark Memorial YMCA
- Clark Power Skating
- clark sports center
- Clarksburg Central Little League
- Clarkston Rotary
- Clarksville Christian School
- Clarksville Running club
- Clarksville Running Club
- CLASP Charity
- Class Act
- Class Act Community Playhouse
- Class Act Musical Theatre
- Classic Race Services
- Classic Run Events
- Classic Soccer Academy
- Classic Tours
- Classic Tours Corporate
- Classic Tours Ltd
- Classroom Antics
- Classroom Antics (legacy - do not use)
- Classroom Matters
- Claverack Free Library
- Claxton-Evans Chamber of Commerce
- Clay County Little League
- Clay Monet
- Clay Road Baptist School
- ClayCreate Pottery Studio
- Clayton McGowan Golf Academy
- Cle Elum Kiwanis
