Organizers
- Senior Resource Services
- Sensation Group
- Sense 5K
- SentryWorld
- SEP Tahoe
- Sepsis Alliance
- Sequim Little League
- Sequoia Brigade Camp
- Sequoia Visalia Kiwanis
- Serenbe
- SereneStrength
- Serenoa Golf Club
- Sergio's Soccer Training LLC
- Serious About Fitness
- Serious Cycling
- Serious4Sport
- Serious4Sport (joint)
- Serious4Sport Camps
- Serious4Sport Private Classes
- Sertoma
- SESA
- Set Free Movement
- Setanta Triathlon Club
- SETGO TRAIN
- Seth Korey Tennis Academy
- Seth Roland Soccer Camp
- Seven Five O
- Seven Hills Running Club
- Seven Oaks Academy
- Seven Oaks Swim Team
- Seven Rivers Paddling
- Seven Springs Mountain Resort
- Seven Studios
- Seventh Green Circle
- Seventh-day Adventist Church
- Severn Centre
- Severna Park Swimming Association
- Severson Dells
- Severson Dells Nature Center
- Sew Shop Junior
- Sewanee Men's Basketball
- Sewanee Women's Lacrosse
- Seward Swim Club
- Seymour High School - IN
- SF tennis center
- SF Turkey Trot
- SFC Aaron Henderson Memorial Run
- SFJC Summer Camp
- SFMadDash
- SFSCI dba Gulf Coast Swim Team
