- YIMBY Praha, z.s.
- Yachtclub Jinočany, z.s.
- Yves Nice
- Yacht club Krnov z.s.
- Yacht club Bystrc Brno z.s.
- YERBABUENATEAM
- YOUnited z. s.
- YAHÚ Team Kostelec, z.s.
- Yacht Club Kotva Praha, z.s.
- Yacht club Slezská Harta z.s.
- YMCA Praha
- Yacht Club Baník Most z. s.
- Yangame Gym
- Yacht Club Lipno nad Vltavou, z.s.
- Y-Club, z.s.
- YACHT CLUB DOKSY, spolek
- Yale Model Government Europe CZ, o. s.
- YogFest z.s.
- Youth Prague z.s.
- Yacht Club Vlhká plachta, z.s.
- Yacht club Labe z. s.
- youmove z.s.
- YACHT CLUB RAZOVÁ z. s.
- Yacht club Vranovská přehrada z.s.
- Yacht klub Junior Praha
- Youth z.s.
- Yamka Minigolfclub Butovice, z. s.
- YZENGRIN z. s.
- Young snipers team, z.s. "v likvidaci"
- Yacht Club Solenice, z. s.
- Youth For Christ Immanuel, z.s.
- Yacht club D.I.M. Bezdrev z.s.
- YWCA v České republice v likvidaci
- YAKSHA GYM PLZEŇ z.s.
- YogafestZLÍN z.s.
- YACHT CLUB MEZ VSETÍN, z.s.
- Yoki Home, z.s.
- Y. C. Zlín v likvidaci
- YACHT CLUB Vysoké Mýto z.s.
- Yachtclub Balaton 24 z.s.
- Yvontek, z.s. v likvidaci
- YACHT CLUB MILEVSKO z.s.
- YCO - Yacht Club Ohrada, z.s.
- YMCA Třebechovice
- Ýpsilon
- Youth For Future, z.s.
- YACHT CLUB PŘÍBRAM, z.s.
- YACHT CLUB A.N.V.
- Young Folks o.s.
- YOUR FREESTYLE ACADEMY z.s.