- Yobi Take Puraha Shakuhachi Collegium z.s.
- YACHTCLUB BANÍK OSTRAVA
- YOUNGTIMER CLASSIC SPORT CARS CLUB, o.s.
- YACHT CLUB PŘÍBRAM, z.s.
- Yacht Club Baník Most z. s.
- YMCA Neveklov "v likvidaci"
- Yacht club Letovice
- Youth and Environment Europe Czech Republic
- YWAM ČR z.s.
- Yoga Ostrava, z.s.
- Youth Europa Czechia z.s.
- YAD Albert z.s.
- Yale Model Government Europe CZ, o. s.
- YOUTH ROMA PARLIAMENT, z. s. v likvidaci
- Young Glass Symposium z.s.
- YC PanCzech, z.s.
- Yacht Club DRAGON 77
- Yetti Club Trutnov z. s.
- Y. C. Zlín v likvidaci
- YMCA Husinec
- you connected, z.s.
- Yacht club ČSA, v likvidaci
- YACHT CLUB DOKSY, spolek
- YACHT CLUB KOLODĚJE
- Yacht klub Jestřábí, z.s.
- YC CoolStar, z.s.
- Yacht Club Slezan Opava, z.s.
- Yacht Club ROLLING BOTTLES, z.s.
- YMCA DAP
- YMCA Pelhřimov, z. s.
- Yoda Mentorship Programme, z.s.
- YACHT CLUB FRYMBURK
- YOUnited z. s.
- Young MBSA
- yo-yo, z. s.
- Youth For Christ Immanuel, z.s.
- YROBAT z.s.
- YACHTCLUB PASOHLÁVKY z. s.
- Yacht Club Lanškroun, z.s.
- YCR - Jachting Roudnice nad Labem, z.s.
- Yorkshire Terrier klub chovatelů a jeho přátel, z.s.
- YEAH, z.s.
- Yoga Slavičín, z.s.
- Yoga Experience Center, z.s.
- YES o.s.
- YMCA Třebechovice
- YC GRAF o.s. v likvidaci
- YogFest z.s.
- YACHT CLUB REGENT z.s.
- Yacht life Seč, z.s.