- Yacht club Labe z. s.
- Yoga Therapy Praha, z. s.
- YES o.s.
- YounGuns Brno, z.s.
- Yacht klub Jestřábí, z.s.
- Youth Prague z.s.
- Yvonne Lombardo
- YEAH, z.s.
- YACHT CLUB Chrášťany z.s.
- YANDEROV, z. s.
- Yachtclub Jinočany, z.s.
- Yes z.s.
- Yacht Club BER Slezská Harta o.s.
- Youth Business Network
- Yacht Club Vlhká plachta, z.s.
- Yacht Club Baník Most z. s.
- YAD Albert z.s.
- YOUnited z. s.
- Yale Model Government Europe CZ, o. s.
- Your Freestyle, o.s. v likvidaci
- Youthink z.s. v likvidaci
- YAMAHA TEAM Petr Kalášek z.s. v likvidaci
- Yacht club Krnov z.s.
- Yacht Club Kozmice - občanské sdružení
- Yacht Club Staré Město Praha, z.s.
- Yukiyama dojo, z. s.
- YELLOW LINE z.s.
- YettiOn, z.s.
- YZENGRIN z. s.
- YMCA Nejdek
- YACHTCLUB BANÍK OSTRAVA
- Yacht club D.I.M. Bezdrev z.s.
- Yacht club Lipno z.s.
- YESYES z.s.
- Yacht Club NEPTUN Komárov z.s.
- Yacht Club ARCHER, z.s.
- Youth Europa Czechia z.s.
- YogFest z.s.
- Youth4Ova, z.s.
- Yamka Minigolfclub Butovice, z. s.
- YMCA Orlová
- Young Initiative z.s.
- you connected, z.s.
- Yetti Club Trutnov z. s.
- YACHT CLUB MILEŠOV z.s.
- YACHT club Jablonec n.Nisou
- YACHT CLUB BOHEMIA z. s.
- Y.C. Markop FL, z.s.
- YachtClub Dyje z.s.
- YC to Stella z.s.