- YAHÚ Team Kostelec, z.s.
- YACHT CLUB NECHRANICE
- Young Planeswalkers
- Yoga Slavičín, z.s.
- Young Brothers Gym z. s.
- YAKSHA GYM PLZEŇ z.s.
- Yachtmeni, z.s.
- YETI RESCUE,z.s.
- Yacht club Jeseník z.s.
- Youth4Ova, z.s.
- YMCA Děčín
- YACHT CLUB SaS, z.s.
- Yoga Therapy Praha, z. s.
- YMCA Jindřichův Hradec
- YACHTGROUP.CZ
- YOUNGTIMER - Česká republika, z.s.
- Yacht klub Strážnice, z.s.
- Yacht club UNICORN, z. s.
- Ýpsilon
- YACHT club Jablonec n.Nisou
- YACHTCLUB BANÍK OSTRAVA
- Young czech talents o.s.
- Yoki Home, z.s.
- Yacht Club Actinet v likvidaci
- Yggdrasil Yoga z. s.
- Yacht klub Junior Praha
- YMCA Podivín, z. s.
- Yacht club Ústí nad Labem z.s.
- Young MBSA
- YogafestZLÍN z.s.
- Yacht Club Slezan Opava, z.s.
- Young Golf Champions z.s.
- YACHT CLUB BOHEMIA z. s.
- YACHT CLUB CERE, z.s.
- YACHT CLUB LESKOVEC, z.s.
- Yamka Minigolfclub Butovice, z. s.
- Yacht Club Kotva Praha, z.s.
- YMCA v České republice
- YMCA Braník
- YACHT CLUB Chrášťany z.s.
- Yacht Club Lanškroun, z.s.
- YACHT CLUB REGENT z.s.
- Yacht Club NEPTUN Komárov z.s.
- Yobi Take Puraha Shakuhachi Collegium z.s.
- YOUTH LEADERSHIP EUROPE v likvidaci
- YC CoolStar, z.s.
- Yacht club Labe z. s.
- Yachtclub Balaton 24 z.s.
- YCO - Yacht Club Ohrada, z.s.
- Yacht life Seč, z.s.