- Youth Included, z. s.
- Yobi Take Puraha Shakuhachi Collegium z.s.
- Youth and World z. s.
- YounGuns Brno, z.s.
- YAD Albert z.s.
- YELLOW FEVER CLUB o.s.
- YROBAT z.s.
- Yacht club UNICORN, z. s.
- Yoki Home, z.s.
- Yacht Club Lipno nad Vltavou, z.s.
- YMCA Orlová
- YEAH, z.s.
- YZENGRIN z. s.
- Yacht Club ROSO Břevnov v likvidaci
- Young MBSA
- YESYES z.s.
- YAMAMOTO Czech z.s.
- Youngtimer Cars Club, z.s.
- YC CoolStar, z.s.
- YMCA Olomouc
- YACHT CLUB MARINA VLTAVA, z.s.
- Young snipers team, z.s. "v likvidaci"
- YMCA Ústí nad Labem
- YORE - Občanské sdružení přátel historie
- YACHT CLUB ORLÍK, z.s.
- Youth Business Network
- YPO Czech Chapter z. s.
- Yachtclub Jinočany, z.s.
- Youth for Youth, z.s.
- YMCA Jindřichův Hradec
- YC to Stella z.s.
- Yorkshire Terrier klub chovatelů a jeho přátel, z.s.
- YOUnited z. s.
- YELLOW LINE z.s.
- YMCA Pelhřimov, z. s.
- Yacht club D.I.M. Bezdrev z.s.
- YACHT CLUB Dvořiště - Lišov, z.s.
- Yacht Club Vlhká plachta, z.s.
- YOUNGTIMER CLASSIC SPORT CARS CLUB, o.s.
- YC RODOP, z.s.
- YACHT CLUB LESKOVEC, z.s.
- YMCA Plzeň, z. s.
- YACHT KLUB JESENICE z.s.
- Y-Club, z.s.
- YachtClub Dyje z.s.
- Yachting CZE, z.s.
- Yak55 Aerobatic Team z.s.
- Yacht club Krnov z.s.
- YAKSHA GYM PLZEŇ z.s.
- YACHT CLUB KOLODĚJE