- Yacht club Lipno z.s.
- Yacht club Bystrc Brno z.s.
- Yachtclub Pardubice, z.s.
- Y.C. Markop FL, z.s.
- YMCA Nejdek
- YMCA Brno
- Yacht club ČSA, v likvidaci
- Yamka Minigolfclub Butovice, z. s.
- Yacht Club ROSO Břevnov v likvidaci
- Yorkshire Terrier klub chovatelů a jeho přátel, z.s.
- Yacht Club PARS, z.s.
- Yoda Mentorship Programme, z.s.
- Yacht club Letovice
- Youth in Czech Republic, z.s.
- YACHT CLUB MILEŠOV z.s.
- Youth Included, z. s.
- YPO Czech Chapter z. s.
- Young czech talents o.s.
- Yvajuk z. s.
- Yobi Take Puraha Shakuhachi Collegium z.s.
- YettiOn, z.s.
- Yacht Club Staré Město Praha, z.s.
- Yacht Club Slezan Opava, z.s.
- YMCA Plzeň, z. s.
- Yacht Club Vlhká plachta, z.s.
- Your Freestyle, o.s. v likvidaci
- YMCA Hradec Králové
- Yacht club Labe z. s.
- YC Frymburk z. s.
- Young Challengers, z.s.
- Youth Europa Czechia z.s.
- Youth Progress, z.s.
- Young Leaders CZ z.s.
- Yvontek, z.s. v likvidaci
- YMCA Podivín, z. s.
- Youthink z.s. v likvidaci
- YMCA v České republice
- YACHT CLUB LESKOVEC, z.s.
- yo-yo, z. s.
- Youth For Future, z.s.
- Yacht Club ROLLING BOTTLES, z.s.
- YMCA Třebechovice
- Yerlango o.s.
- YAHÚ Team Kostelec, z.s.
- Yoga House, z.s.
- Ýpsilon
- Yoga Therapy Praha, z. s.
- YACHT CLUB Chrášťany z.s.
- YROBAT z.s.
- YMCA DAP