- Yacht Club Yachta´s z.s.
- Yobi Take Puraha Shakuhachi Collegium z.s.
- YC RODOP, z.s.
- YIMBY Praha, z.s.
- YACHT KLUB JESENICE z.s.
- YFU CZ, z.s.
- YACHT CLUB MILEŠOV z.s.
- YACHT CLUB SILŮVKY, z.s.
- YOUTH LEADERSHIP EUROPE v likvidaci
- Yoga retreat club z.s.
- Youth Business Network
- Yacht Club PARS, z.s.
- YMCA Olomouc
- Young Initiative z.s.
- YPG Evropa, z.s. v likvidaci
- Ygdrassil, z.s.
- YACHT CLUB MEZ VSETÍN, z.s.
- Yoda Mentorship Programme, z.s.
- Young Riders & Horses z.s.
- Yamaha Star Czech Republic z.s. "v likvidaci"
- Youth z.s.
- Yellow Hills z. s.
- YELLOW FEVER CLUB o.s.
- YMPAL- SPORT, o.s.
- Yoga Slavičín, z.s.
- Yacht Racing Team z.s.
- YMCA Plzeň, z. s.
- YACHT club Jablonec n.Nisou
- YMCA DAP
- Yacht club D.I.M. Bezdrev z.s.
- Youth Europa Czechia z.s.
- YAKSHA GYM PLZEŇ z.s.
- YACHT CLUB A.N.V.
- YARD RESORT, z.s.
- yo-yo, z. s.
- YOUNGTIMER - Česká republika, z.s.
- Yankee and Confederate Artillery Club Y.A.K.A.C.
- Yacht Club ROLLING BOTTLES, z.s.
- Yukiyama dojo, z. s.
- Yacht klub Strážnice, z.s.
- YMCA v České republice
- Ýpsilon
- YANDEROV, z. s.
- YMCA Orlová
- Yes z.s.
- YOUNGTIMER CLASSIC SPORT CARS CLUB, o.s.
- Yvontek, z.s. v likvidaci
- YogFest z.s.
- YMCA LIBEREC
- YACHTCLUB BANÍK OSTRAVA