Organizers
- Umpires NW
- UMPQUA TENNIS CENTER
- Unadilla Firefighters Association, Inc.
- Unbeatable Tennis
- Unbreakable Fitness
- UNC Finley Golf Course
- UNC Pembroke
- Uncommon Camps
- Under Blue Waters
- Understanding Islam Academy
- Undisputed Runs LLC
- UNF Recreation
- UNF Recreation and Wellness
- unfair advantage llc
- Unfair Advantage Performance, LLC
- Union Aquatic Club
- Union Baseball Association
- Union City Leisure Services
- Union College
- Union County QB Club
- Union County Swim
- Union County Youth League
- Union Girls Softball Club
- Union Mission Ministries Inc
- Union Pizza & Brew CO
- Union Station Homeless Services
- UNION Volleyball Club
- Union Youth Association
- Uniontown Bible Church
- Unique Soccer Academy
- Unit 43B Contact
- United Ballers Youth Sports
- United Brachial Plexus Network
- United Christian Academy
- United Counseling Service
- UNITED FASTPITCH ORG
- United Hillandalers Challenge
- United Soccer Coaching
- United Softball Association
- United Southern Girls Faspitch
- United Southern Girls Fasptich
- United Southern Girls Fastpitch
- United Sports
- United States Adaptive Golf Alliance
- United States and Canadian Academy of Pathology
- United States Fastpitch Association
- United States Naval Sea Cadet Corps - Pacific Southwest Region 11
- United States Navy
- United States of America Cricket Association
- United States Powerlifting Association
