- Yacht Club Nautilus Praha
- YESYES z.s.
- YachtClub Dyje z.s.
- Yacht club Slezská Harta z.s.
- YACHT CLUB KOLODĚJE
- YACHT CLUB CERE, z.s.
- Youth Included, z. s.
- YMCA Setkání
- YC to Stella z.s.
- Yale Model Government Europe CZ, o. s.
- Youth For Christ Immanuel, z.s.
- YACHT CLUB Chrášťany z.s.
- YOUNG TALENTS, z. s.
- YACHT CLUB LESKOVEC, z.s.
- Young Challengers, z.s.
- Young Initiative z.s.
- YAMAHA TEAM Petr Kalášek z.s. v likvidaci
- YMPAL- SPORT, o.s.
- Young Czech Arbitration Professionals, z.s.
- YMCA Braník
- You can do it!, z.s.
- Young Golf Champions z.s.
- Young Folks o.s.
- YACHT CLUB SALAŠ
- YMCA LIBEREC
- YOUR FREESTYLE ACADEMY z.s.
- YMCA Praha
- Yankee and Confederate Artillery Club Y.A.K.A.C.
- Yacht klub Junior Praha
- Young Brothers Gym z. s.
- YEAH, z.s.
- YMCA Jindřichův Hradec
- YC Píšťany - vodní sporty
- YES o.s.
- YPO Czech Chapter z. s.
- Yacht klub Strážnice, z.s.
- you connected, z.s.
- Yacht Club Kovářov z.s.
- Youngtimer Cars Club, z.s.
- YettiOn, z.s.
- YACHT CLUB PŘÍBRAM, z.s.
- Yacht Club PARS, z.s.
- Yogadana, z.s.
- Yellow Hills z. s.
- Y.C. Markop FL, z.s.
- YACHT CLUB MARINA VLTAVA, z.s.
- YACHT CLUB MILEVSKO z.s.
- YAHÚ Team Kostelec, z.s.
- Yvonne Lombardo
- Yes z.s.