- YOUNG TALENTS, z. s.
- Ýpsilon
- Yacht Club DRAGON 77
- YACHT CLUB Chrášťany z.s.
- Young Leaders CZ z.s.
- Yvajuk z. s.
- Yves Nice
- YACHT CLUB RAZOVÁ z. s.
- Yukiyama dojo, z. s.
- YMCA Ústí nad Labem
- Young czech talents o.s.
- Yacht Club Staré Město Praha, z.s.
- Yoga fest České Budějovice z. s.
- YACHT KLUB JESENICE z.s.
- Yacht Club Solenice, z. s.
- Youth Europa Czechia z.s.
- Your Cooking Project, z.s.
- YMCA SKAUT
- YachtClub Dyje z.s.
- YMCA Olomouc
- YC Frymburk z. s.
- Ynnovations - Institut pro znalostní společnost v likvidaci
- Youth Prague z.s.
- YROBAT z.s.
- Young Brothers Gym z. s.
- YES o.s.
- YACHT CLUB NECHRANICE
- Yamka Minigolfclub Butovice, z. s.
- YOUTH LEADERSHIP EUROPE v likvidaci
- Young Riders & Horses z.s.
- YounGuns Brno, z.s.
- Y.C. Nové Sedlo
- YELLOW FEVER CLUB o.s.
- Youth Progress, z.s.
- Yoga Surya International, z.s.
- YACHT CLUB BOHEMIA z. s.
- YMCA Jindřichův Hradec
- Yacht Club Bohemia o.s.
- Yogadana, z.s.
- YACHT CLUB LESKOVEC, z.s.
- Yacht Club Tachov z.s.
- YMCA Neveklov "v likvidaci"
- YettiOn, z.s.
- Yacht klub Strážnice, z.s.
- Yettey v likvidaci
- YACHT CLUB REGENT z.s.
- YACHTCLUB BANÍK OSTRAVA
- Y-Club, z.s.
- Yerlango o.s.
- YACHT CLUB MEZ VSETÍN, z.s.