- Yellow Hills z. s.
- Yankee and Confederate Artillery Club Y.A.K.A.C.
- Young Golf Champions z.s.
- Ýpsilon
- YACHT CLUB MILEŠOV z.s.
- Yoshinkan Nové Město nad Metují, z.s.
- Young czech talents o.s.
- YMCA Sever, z. s.
- Yobi Take Puraha Shakuhachi Collegium z.s.
- youmove z.s.
- YELLOW FEVER CLUB o.s.
- you connected, z.s.
- Yachting CZE, z.s.
- Yukiyama dojo, z. s.
- Yacht club D.I.M. Bezdrev z.s.
- YACHT club Jablonec n.Nisou
- YOUnique z.s.
- Yggdrasil Yoga z. s.
- Yacht klub CERE Plzeň
- YACHT CLUB MARINA VLTAVA, z.s.
- YOUTH LEADERSHIP EUROPE v likvidaci
- Yak55 Aerobatic Team z.s.
- YERBABUENATEAM
- Youth Europa Czechia z.s.
- YACHT CLUB Vysoké Mýto z.s.
- Yacht Club Tachov z.s.
- Yacht club Letovice
- YACHT CLUB LESKOVEC, z.s.
- Yacht Club Vlhká plachta, z.s.
- Yves Nice
- yeah-but-still z.s.
- Yachtclub Jinočany, z.s.
- YMCA - Živá rodina
- YORE - Občanské sdružení přátel historie
- Young snipers team, z.s. "v likvidaci"
- Yoga Slavičín, z.s.
- YACHT CLUB MEZ VSETÍN, z.s.
- Youth For Future, z.s.
- Your Cooking Project, z.s.
- Yetti Club Trutnov z. s.
- YMCA Letohrad
- YPG Evropa, z.s. v likvidaci
- YWCA v České republice v likvidaci
- YACHT CLUB SaS, z.s.
- Young Leaders CZ z.s.
- YAMAHA TEAM Petr Kalášek z.s. v likvidaci
- YOUNGTIMER CLASSIC SPORT CARS CLUB, o.s.
- YAKSHA GYM PLZEŇ z.s.
- YMCA Braník
- Yacht Club Rabyně-Babor v likvidaci