Organizers
- CASA of Kern County
- CASA of Marion County
- CASA of Robertson County
- CASA of Siskiyou County
- CASA of Southeast Texas, Inc.
- CASA of SW Oklahoma
- CASA of the Eastern Panhandle, Inc.
- CASA of the Eleventh Jud. Cir.
- CASA of the Ninth
- CASA of the Southern Tier, Inc.
- CASA of Union County
- CASA Works, Inc.
- Casady School
- Cascade 5K
- Cascade Mountain School
- Cascade Sports Event
- Cascade Youth
- Cascade Youth Org
- Cascade Youth Organiation
- Cascades Cycling Club
- Casco Run/Walk
- Casey Cares Foundation
- Casey Jones Shamrock 5K Run/Walk
- Cashiers Area Chamber of Commerce
- CASMA Toronto
- Casper College Alumni Association
- Casper Family YMCA
- Casper Recreational Leagues Association
- Cass County Family YMCA
- Casselberry Little League
- Cassie's Dance Camp
- Cast a Shadow
- Castaic Area Town Council
- CAST-Creative After School Theatre
- Casting for Recovery, East Tennessee Program
- Castle Race Series GBP
- Castle Rock Health and Fitness
- Castle Rock Knights
- Castle Rock Recreation Center
- Castle Triathlon Series
- Castlegar Aquanauts
- Castlewood Barracudas
- Castro Valley Junior Tennis
- Castro Valley Track Club
- Castroville, Texas
- CAT Running
- Cat Tales, Inc
- Catamount Outdoor Family Center
- Catawba Valley Heritage Alliance
- Catch A Lift Fund
