Organizers
- 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
- Sewickley Academy
- Seymour High School - IN
- Seymour Youth League
- SF tennis center
- SF Turkey Trot
- SFC Aaron Henderson Memorial Run
- SFJC Summer Camp
- SFMadDash
- SFSCI dba Gulf Coast Swim Team
- SFTRU Firearms Academy
- SFWS Camps and Clubs
- SG Wolves
- SGS Tool Company
- Sgt Gonzalez Foundation
- Sgt Thomas E Larner Memorial 5k and 10k
- SHA Missions
- Shaawnee Hills Arts Council
- Shade Gap PTO
- Shades Crest Baptist Church
- Shades Mountain Baptist Church
- Shadey's Rugged Run
- Shadow Mountain Golf Club
