- YACHT CLUB LESKOVEC, z.s.
- Yacht Club Poseidon Praha z. s.
- Yacht Club Baník Most z. s.
- Yoga House, z.s.
- yo-yo, z. s.
- YOUNGTIMER CLASSIC SPORT CARS CLUB, o.s.
- You can do it!, z.s.
- Yes z.s.
- YACHTCLUB PETROV z.s., v likvidaci
- Yacht klub J.J.J., z.s.
- YELLOW LINE z.s.
- YWCA v České republice v likvidaci
- YACHTGROUP.CZ
- Young Leaders CZ z.s.
- YACHT CLUB Chrášťany z.s.
- Youth z.s.
- YETI RESCUE,z.s.
- Youth Progress, z.s.
- Yacht Club DRAGON 77
- Yvontek, z.s. v likvidaci
- YACHT CLUB MISTRAL
- YACHT CLUB MARINA VLTAVA, z.s.
- Yggdrasil Yoga z. s.
- Young Challengers, z.s.
- Young czech talents o.s.
- Yoga fest České Budějovice z. s.
- Yoga retreat club z.s.
- Yoki Home, z.s.
- Yale Model Government Europe CZ, o. s.
- Yettey v likvidaci
- Young Brothers Gym z. s.
- YMCA Brno
- Yachtclub Balaton 24 z.s.
- YWAM ČR z.s.
- YMCA Orlová
- Yacht club Letovice
- Yacht Club Kovářov z.s.
- yeah-but-still z.s.
- Yamka Minigolfclub Butovice, z. s.
- YogFest z.s.
- YERBABUENATEAM
- Yoda Mentorship Programme, z.s.
- YCO - Yacht Club Ohrada, z.s.
- YACHT CLUB REGENT z.s.
- YMCA Husinec
- Young Folks o.s.
- YACHT CLUB KOLODĚJE
- Yacht club ČSA, v likvidaci
- YOUnited z. s.
- YACET-MLÁDEŽ, UMĚNÍ A KREATIVITA V EVROPĚ