- YACHT CLUB MILEVSKO z.s.
- Yacht Club Říčany
- Yoga Surya International, z.s.
- Yacht Club NEPTUN Komárov z.s.
- Yellow Sisters z. s.
- Yves Nice
- YogafestZLÍN z.s.
- YACHT CLUB KLADNO z.s.
- YOUNGTIMER - Česká republika, z.s.
- YPO Czech Chapter z. s.
- YOUTH ROMA PARLIAMENT, z. s. v likvidaci
- YZENGRIN z. s.
- Yacht club Ústí nad Labem z.s.
- Yettey v likvidaci
- Yacht Club Nový Jičín z.s.
- YPG Evropa, z.s. v likvidaci
- YAHÚ Team Kostelec, z.s.
- YACHT CLUB SILŮVKY, z.s.
- Youth z.s.
- YC Lískovec z.s.
- YACHT CLUB MISTRAL
- Yacht klub CERE Plzeň
- Young MBSA
- YARD RESORT, z.s.
- YMCA DAP
- YMCA Hradec Králové
- YACHT CLUB MEZ VSETÍN, z.s.
- Yak55 Aerobatic Team z.s.
- YOUnited z. s.
- YMCA Setkání
- YMCA Podivín, z. s.
- Yacht Club ROLLING BOTTLES, z.s.
- Yobi Take Puraha Shakuhachi Collegium z.s.
- Yacht club Krnov z.s.
- Yacht club Bystrc Brno z.s.
- Yacht club D.I.M. Bezdrev z.s.
- Yacht Club Lipno nad Vltavou, z.s.
- Yacht Club ROSO Břevnov v likvidaci
- Youth For Future, z.s.
- YANDEROV, z. s.
- Yacht Club Řež z.s.
- Yogadana, z.s.
- YAKSHA GYM PLZEŇ z.s.
- Youth Prague z.s.
- Youth for Youth, z.s.
- Youth Europa Czechia z.s.
- Yacht Club Kotva Praha, z.s.
- Young Glass Symposium z.s.
- Young Czech Arbitration Professionals, z.s.
- Yacht club ČSA, v likvidaci