- Yacht club UNICORN, z. s.
- Yamaha Star Czech Republic z.s. "v likvidaci"
- YMCA Letohrad
- Youth For Christ Immanuel, z.s.
- YogFest z.s.
- Yankee and Confederate Artillery Club Y.A.K.A.C.
- Yacht Club DRAGON 77
- YC to Stella z.s.
- YAGANA Lucky zone, z.s.
- YACHTCLUB BANÍK OSTRAVA
- Yacht life Seč, z.s.
- YACHTCLUB PASOHLÁVKY z. s.
- Yacht Club Říčany
- YEAH, z.s.
- Yacht Club Lanškroun, z.s.
- YROBAT z.s.
- Yamka Minigolfclub Butovice, z. s.
- YMCA Neveklov "v likvidaci"
- Yettey v likvidaci
- Yggdrasil Yoga z. s.
- YACHT CLUB MILEŠOV z.s.
- Ynnovations - Institut pro znalostní společnost v likvidaci
- YIMBY Praha, z.s.
- Yacht club Labe z. s.
- you connected, z.s.
- Youth Business Network
- Yorkshire Terrier klub chovatelů a jeho přátel, z.s.
- YACHT CLUB MILEVSKO z.s.
- YMCA Hradec Králové
- Yacht club Bystrc Brno z.s.
- Yacht Club Poseidon Praha z. s.
- Yacht klub Junior Praha
- Youth Europa Czechia z.s.
- YAMAMOTO Czech z.s.
- Yacht club Vranovská přehrada z.s.
- YMCA Ostrava-Poruba
- Young Leaders CZ z.s.
- Ýpsilon
- Yacht Club Bohemia o.s.
- Y-Club, z.s.
- Yoga retreat club z.s.
- Your Freestyle, o.s. v likvidaci
- YERBABUENATEAM
- YACHT CLUB A.N.V.
- Yacht club Krnov z.s.
- Yachtclub Jinočany, z.s.
- YPG Evropa, z.s. v likvidaci
- Yacht club Ústí nad Labem z.s.
- YMCA Třebechovice
- Yoda Mentorship Programme, z.s.