- Yacht Club Solenice, z. s.
- YACHT CLUB MILEŠOV z.s.
- YMCA Podivín, z. s.
- Yacht Club Actinet v likvidaci
- Yacht club Labe z. s.
- YogafestZLÍN z.s.
- Yacht Club Bohemia o.s.
- Y.C. Markop FL, z.s.
- Young Planeswalkers
- Yorkshire Terrier klub chovatelů a jeho přátel, z.s.
- Youth Progress, z.s.
- Yankee and Confederate Artillery Club Y.A.K.A.C.
- youmove z.s.
- you connected, z.s.
- Yacht Club Velké Dářko o.s.
- YC RODOP, z.s.
- Yacht Club BER Slezská Harta o.s.
- YESYES z.s.
- Yetti Club Trutnov z. s.
- Yacht klub Jestřábí, z.s.
- YFU CZ, z.s.
- Yvajuk z. s.
- Young Challengers, z.s.
- YMCA Strmilov
- YMCA SKAUT
- Yoga Surya International, z.s.
- Young Czech Arbitration Professionals, z.s.
- YMCA v České republice
- Yangame Gym
- YPG Evropa, z.s. v likvidaci
- Young Folks o.s.
- Yak55 Aerobatic Team z.s.
- Yacht Club Tachov z.s.
- Ynnovations - Institut pro znalostní společnost v likvidaci
- Y - Open, z.s.
- Yacht Club Staré Město Praha, z.s.
- Young MBSA
- YMPAL- SPORT, o.s.
- Yacht klub Mělník z.s.
- Yacht Club Řež z.s.
- Yachtclub Pardubice, z.s.
- YogFest z.s.
- Yacht Club ROLLING BOTTLES, z.s.
- Yacht club Znojmo, z.s.
- Youth and Environment Europe Czech Republic
- YIMBY Praha, z.s.
- Yacht Club PARS, z.s.
- YERBABUENATEAM
- YACHTCLUB PETROV z.s., v likvidaci
- Yacht club Bystrc Brno z.s.