- Yacht club Lipno z.s.
- YACHT CLUB Chrášťany z.s.
- YAKSHA GYM PLZEŇ z.s.
- Y.C. Markop FL, z.s.
- YACHT KLUB JESENICE z.s.
- Young Leaders CZ z.s.
- Yacht Club Kotva Praha, z.s.
- YETI RESCUE,z.s.
- YACHT CLUB NECHRANICE
- Yangame Gym
- Yacht Club Poseidon Praha z. s.
- Young Czech Arbitration Professionals, z.s.
- YCR - Jachting Roudnice nad Labem, z.s.
- YACHTCLUB PETROV z.s., v likvidaci
- YACHT CLUB MILEŠOV z.s.
- youmove z.s.
- YACHT CLUB A.N.V.
- YOUTH ROMA PARLIAMENT, z. s. v likvidaci
- YES o.s.
- Yacht club Vranovská přehrada z.s.
- YORE - Občanské sdružení přátel historie
- YettiOn, z.s.
- YogFest z.s.
- YACHT club Jablonec n.Nisou
- Yacht Club ROSO Břevnov v likvidaci
- Yoga House, z.s.
- YMCA Praha
- YC RODOP, z.s.
- YMCA Braník
- YOUR FREESTYLE ACADEMY z.s.
- Yak55 Aerobatic Team z.s.
- Yacht club Santa Maria v likvidaci
- Ynnovations - Institut pro znalostní společnost v likvidaci
- YACHTGROUP.CZ
- Yachtclub Balaton 24 z.s.
- YACHT CLUB CERE, z.s.
- Youth For Future, z.s.
- Young Planeswalkers
- Yacht Club Slezan Opava, z.s.
- Youth Europa Czechia z.s.
- Yacht club Ústí nad Labem z.s.
- YAD Albert z.s.
- Yachtmeni, z.s.
- Yves Hélory, z. s.
- yFilm
- Yankee and Confederate Artillery Club Y.A.K.A.C.
- YMCA Strmilov
- Young Folks o.s.
- Yellow Hills z. s.
- Y.C. Nové Sedlo