- Yacht Club Rabyně-Babor v likvidaci
- Youth Business Network
- Yacht life Seč, z.s.
- Young Planeswalkers
- Yacht club D.I.M. Bezdrev z.s.
- YACHT CLUB SILŮVKY, z.s.
- Yacht Club Yachta´s z.s.
- Yoga Therapy Praha, z. s.
- YACHT CLUB REGENT z.s.
- Yvonne Lombardo
- Yacht Club Staré Město Praha, z.s.
- Yamka Minigolfclub Butovice, z. s.
- Youth Progress, z.s.
- Yggdrasil Yoga z. s.
- Yacht club Lipno z.s.
- Yacht Club Lipno nad Vltavou, z.s.
- YACHT CLUB NECHRANICE
- Youth Included, z. s.
- Yacht Club BER Slezská Harta o.s.
- Young Challengers, z.s.
- Yerlango o.s.
- YMCA Husinec
- Yacht Club Velké Dářko o.s.
- Yorkshire Terrier klub chovatelů a jeho přátel, z.s.
- Yacht club Bystrc Brno z.s.
- YMCA Brno
- YPJ Evropa, z.s. v likvidaci
- Yogadana, z.s.
- YMCA Sever, z. s.
- Youth Europa Czechia z.s.
- YMCA Braník
- YANDEROV, z. s.
- YOUnited z. s.
- YMCA Třebechovice
- Yankee and Confederate Artillery Club Y.A.K.A.C.
- YOUNG TALENTS, z. s.
- YACHT CLUB A.N.V.
- YMCA Jindřichův Hradec
- Yacht Club Nautilus Praha
- Yachtclub Pardubice, z.s.
- Yacht club Labe z. s.
- You can do it!, z.s.
- Ýpsilon
- YounGuns Brno, z.s.
- Y. C. Zlín v likvidaci
- Youth4Ova, z.s.
- Young Initiative z.s.
- Young Riders & Horses z.s.
- Yacht club Vranovská přehrada z.s.
- YERBABUENATEAM