- Youth Europa Czechia z.s.
- Yacht Club ROLLING BOTTLES, z.s.
- YIMBY Praha, z.s.
- YES o.s.
- Yoga Ostrava, z.s.
- Yacht club Vranovská přehrada z.s.
- YMCA Brno
- YOUR FREESTYLE ACADEMY z.s.
- Yacht Club Velké Dářko o.s.
- Yacht club UNICORN, z. s.
- Yoga fest České Budějovice z. s.
- YMCA Sever, z. s.
- YAMAHA TEAM Petr Kalášek z.s. v likvidaci
- YC Lískovec z.s.
- YACHT CLUB SILŮVKY, z.s.
- YAGANA Lucky zone, z.s.
- YC to Stella z.s.
- Yacht life Seč, z.s.
- Yacht Club Říčany
- YAHÚ Team Kostelec, z.s.
- YAMAMOTO Czech z.s.
- YACHT CLUB NECHRANICE
- YOUNGTIMER - Česká republika, z.s.
- Ýpsilon
- YOUNG TALENTS, z. s.
- Yukiyama dojo, z. s.
- Yacht Club Yachta´s z.s.
- YWCA v České republice v likvidaci
- Yorkshire Terrier klub chovatelů a jeho přátel, z.s.
- Youth Prague z.s.
- YROBAT z.s.
- Youth For Christ Immanuel, z.s.
- Yogadana, z.s.
- Yacht Club NEPTUN Komárov z.s.
- Yacht Club Solenice, z. s.
- Yoga Surya International, z.s.
- Yachtclub Jinočany, z.s.
- YACHT CLUB LESKOVEC, z.s.
- Youth Included, z. s.
- Yak55 Aerobatic Team z.s.
- YACHT club Jablonec n.Nisou
- Yacht Club Nautilus Praha
- YETI RESCUE,z.s.
- Yellow Sisters z. s.
- Yacht club Letovice
- YESYES z.s.
- Yetti Club Trutnov z. s.
- YWAM ČR z.s.
- YACHT KLUB JESENICE z.s.
- yeah-but-still z.s.