Organizers
- School District No. 38 (Richmond)
- Schools of the Sacred Heart - San Francisco
- Science Matters
- ScienceClubz Ltd
- SciGenie
- Scotia Amateur Swimming Club
- Scott Carter Foundation
- SCRD
- SCTA
- SDMF Community Ed. & Recreation
- SDPBC | Adult and Community Education
- Sea Devil Swimming
- Sea Otter Classic
- Sea Star Explorations, LLC
- Seabury School
- Seacoast Repertory Theatre
- Seamark Ranch
- Sean Phillips Soccer
- Seattle JazzED
- Seattle Pacific University
- Sebastian Inlet Surf and Sport
- Seekers Wild
- Seguin Independent School District
- Semiahmoo House Society
- Seneca Falls Community Little League
- Sensation Group
- Servite High School
- Set Free Movement
- Sew Shop Junior
- Seward Swim Club
- Sewickley Academy
- SF Turkey Trot
- Shape Performance
- Shared Science
- Sheridan Arts Foundation
- Shoot 360 Birmingham
- Shoot 360 Cordova
- Shoot 360 Huntsville
- Shoot 360 Louisville
- Shoot 360 Madison
- Shoot 360 Memphis
- Shoot 360 Sherwood Park
- Shoot 360 Woodbury
- Shoot to Score Hockey
- Shoot360 Torrance
- Shooting Stars Special Needs Group Inc
- Shoreline Sharks
- Showball Baseball
- Shred Sisters
- Sidney Piranhas_BCSSA
