Organizers
- South Texas Health System
- South Texas Juvenile Diabetes Association
- South Tipperary Sports Partnership
- South Towns Tennis Club
- South Whidbey Parks & Recreation District / Whidbey Island Triathlon
- South Windsor Parks & Recreation Department
- South Wood County Humane Society
- South Wood County YMCA
- Southampton Little League
- Southampton Sailing Week
- Southeast Alabama Community Foundation
- Southeast Alaska Independent Living
- Southeast Bulloch High Cross Country
- Southeast Family YMCA
- Southeast Georgia Health System
- Southeast Healthpoint Fitness
- Southeast Little League
- SOUTHEAST SOCCER CLUB
- Southeast Tennis and Learning Center
- Southeast Texas Hoops
- Southeast Umpire Camps
- Southeastern Cal Ripken
- Southeastern Cancer Care
- Southeastern Greyhound Adoption
- Southeastern LA FCA
- Southeastern Livingston County Recreation Authority (SELCRA)
- Southeastern Ohio Trail Runners
- Southeastern Regional Action Council
- Southeastern Summer Theatre Institute
- Southeastern University
- Southern Adventist University Outdoor Leadership
- Southern Adventist University School of PEHW
- Southern Appalachian Racing, LLC
- Southern Area Hospice Services
- Southern Arizona Roadrunners
- Southern Bicycle League
- Southern Boone Area YMCA
- Southern California Half Marathon & 5K
- Southern California PGA
- Southern California Road Runners of Walnut
- Southern California Tennis Academy
- Southern Colorado Veterinary Internal Medicine
- Southern Cyclists of Statesboro
- Southern Elite
- Southern Farms
- Southern Food & Beverage Museum Children's Programs
- Southern Food and Beverage Museum Children's Programs
- Southern Hills Plantation Club
- Southern Hills Running Club
- Southern Idaho Cycling Klub
