- Yacht club Bystrc Brno z.s.
- Young Folks o.s.
- Yellow Sisters z. s.
- Yacht Club Kovářov z.s.
- Young Planeswalkers
- YMCA Ústí nad Labem
- YIMBY Praha, z.s.
- Your Freestyle, o.s. v likvidaci
- YOUNG TALENTS, z. s.
- YACHT CLUB DOKSY, spolek
- YES o.s.
- YAKSHA GYM PLZEŇ z.s.
- YMCA Braník
- Youth in Czech Republic, z.s.
- YC RODOP, z.s.
- YettiOn, z.s.
- Young Leaders CZ z.s.
- Yoga retreat club z.s.
- YC to Stella z.s.
- Yacht club Vranovská přehrada z.s.
- Youth For Christ Immanuel, z.s.
- Yachting CZE, z.s.
- Yacht Club Lipno nad Vltavou, z.s.
- YEAH, z.s.
- YACHT CLUB Dvořiště - Lišov, z.s.
- YMCA Jindřichův Hradec
- Young Czech Arbitration Professionals, z.s.
- Yacht Club Skochovice
- YACHT CLUB SILŮVKY, z.s.
- Yacht klub Junior Praha
- Youth and Students for Peace Czech Republic z.s.
- YOUTH ROMA PARLIAMENT, z. s. v likvidaci
- Yacht Club ROSO Břevnov v likvidaci
- Yorkshire Terrier klub chovatelů a jeho přátel, z.s.
- YMCA Sever, z. s.
- Yacht klub Strážnice, z.s.
- Young snipers team, z.s. "v likvidaci"
- YMCA Neveklov "v likvidaci"
- YACHT KLUB JESENICE z.s.
- YAMAMOTO Czech z.s.
- Yetti Club Trutnov z. s.
- Yacht Club NEPTUN Komárov z.s.
- Yacht Club Velké Dářko o.s.
- Yacht Club ROLLING BOTTLES, z.s.
- YACHTCLUB PETROV z.s., v likvidaci
- YC PanCzech, z.s.
- YZENGRIN z. s.
- Yacht Club Bohemia o.s.
- YPG Evropa, z.s. v likvidaci
- Y-Club, z.s.