- Young Initiative z.s.
- Young Brothers Gym z. s.
- Yacht Club Velké Dářko o.s.
- YACHT CLUB MISTRAL
- YACHT CLUB KLADNO z.s.
- YACHT CLUB SaS, z.s.
- Young Golf Champions z.s.
- YettiOn, z.s.
- YAD Albert z.s.
- Yvontek, z.s. v likvidaci
- YACHT CLUB Vysoké Mýto z.s.
- Yacht Racing Team z.s.
- YELLOW LINE z.s.
- YMCA Třebechovice
- YCR - Jachting Roudnice nad Labem, z.s.
- Yak55 Aerobatic Team z.s.
- Youngtimer Cars Club, z.s.
- Yacht club Bystrc Brno z.s.
- YMCA LIBEREC
- YACHT KLUB JESENICE z.s.
- YMCA v České republice
- Yoga Therapy Praha, z. s.
- YOUR FREESTYLE ACADEMY z.s.
- Yvajuk z. s.
- Yoga House, z.s.
- Yacht klub CERE Plzeň
- YOUNGTIMER - Česká republika, z.s.
- Youth in Czech Republic, z.s.
- Yellow Hills z. s.
- Yacht Club Kotva Praha, z.s.
- YACHT CLUB DOKSY, spolek
- you connected, z.s.
- YELLOW FEVER CLUB o.s.
- Young Glass Symposium z.s.
- Yacht club ANCORA
- Yorkshire Terrier klub chovatelů a jeho přátel, z.s.
- Youth Prague z.s.
- YANDEROV, z. s.
- YOUnited z. s.
- Yacht Club Říčany
- Y.C. Nové Sedlo
- Young Folks o.s.
- YARD RESORT, z.s.
- YMCA Pelhřimov, z. s.
- Yacht Club Lipno nad Vltavou, z.s.
- YMCA Plzeň, z. s.
- Youth z.s.
- YWCA v České republice v likvidaci
- Yerlango o.s.
- Yacht club UNICORN, z. s.