Organizers
- Star City Academy for the Performing Arts
- Star Through Hoops
- Star-Tastic Camps LTD
- StartLine Sports LLC
- STEAM to-go
- STEAM Works
- STEEN SPORTS SYSTEMS
- Steffens Sports LLC
- Stemtree of Carmel
- Stemtree of Fairfax
- Stemtree of Midlothian
- Stemtree of Spring
- Stemtree of Vienna, VA
- Stickwise.Ltd
- Stonecreek Church
- STOP, SWAP AND SAVE
- Story Quest Studios
- Story Theater Company
- Straight Shooter TX
- Strasburg Parks and Rec District
- Stratford Schools
- Streets Are For Everyone (SAFE)
- Stride Events
- Strive Scholarship White Bear Lake
- Strive Soccer LLC
- Strong Wings Adventure School
- Studio East
- Studio Muse Music
- STUNT Camp
- Sturgeon Little League
- Stutelage Innovations
- Sugar Bowl Academy
- SumMAT Camp (by Charest Alpinism LLC dba Petra Cliffs)
- Summer at Blake
- Summer at CHS
- Summer Camp Advisory Team: IDEAS Camps | Rancho Camps
- Summer on the Prairie
- Summit School
- Sun City Mesquite
- Sunlight Winter Sports Club
- Sunnyside Stables
- Sunrise Recreation and Park district
- SUNSET HILLS PARKS & RECREATION
- Sunset Playhouse, Inc
- Super Ninja World
- Super Programming
- Superior Science
- SuperNOVA at Dalhousie University (CAD)
- Supertri
- Sure Shot Basketball Camp
