- yeah-but-still z.s.
- Yacht Club NEPTUN Komárov z.s.
- Yacht Club Vlhká plachta, z.s.
- Y.C. Nové Sedlo
- YACHTGROUP.CZ
- YachtClub Dyje z.s.
- Yacht klub CERE Plzeň
- YOUnique z.s.
- Ýpsilon
- Y. C. Zlín v likvidaci
- Yoki Home, z.s.
- YMCA LIBEREC
- YACHT CLUB MILEVSKO z.s.
- YMCA Jindřichův Hradec
- Yacht Club ROLLING BOTTLES, z.s.
- Yale Model Government Europe CZ, o. s.
- Yacht klub Junior Praha
- YANDEROV, z. s.
- Youngtimer Cars Club, z.s.
- YACET-MLÁDEŽ, UMĚNÍ A KREATIVITA V EVROPĚ
- Yacht Club Nautilus Praha
- YOUR FREESTYLE ACADEMY z.s.
- YACHT CLUB MARINA VLTAVA, z.s.
- YC Píšťany - vodní sporty
- Youth For Christ Immanuel, z.s.
- Youth and Students for Peace Czech Republic z.s.
- Yankee and Confederate Artillery Club Y.A.K.A.C.
- Young Folks o.s.
- Young Brothers Gym z. s.
- Yacht club Ústí nad Labem z.s.
- Yacht Club Staré Město Praha, z.s.
- YAHÚ Team Kostelec, z.s.
- Yogadana, z.s.
- Yacht Club Skochovice
- Yacht Club Nový Jičín z.s.
- YACHT KLUB JESENICE z.s.
- Yangame Gym
- YACHTCLUB PETROV z.s., v likvidaci
- YC to Stella z.s.
- YESYES z.s.
- Yamaha Star Czech Republic z.s. "v likvidaci"
- YACHT CLUB ORLÍK, z.s.
- YMCA Děčín
- Yacht club Bystrc Brno z.s.
- Yacht Club Baník Most z. s.
- YACHT CLUB MISTRAL
- YMCA Orlová
- Yvontek, z.s. v likvidaci
- Yacht klub Strážnice, z.s.
- YAD Albert z.s.