- Yoki Home, z.s.
- Yes z.s.
- Yacht club Bystrc Brno z.s.
- Yamaha Star Czech Republic z.s. "v likvidaci"
- Yacht klub J.J.J., z.s.
- Yoga Therapy Praha, z. s.
- Yacht Club NEPTUN Komárov z.s.
- Y.C. Nové Sedlo
- Youth in Czech Republic, z.s.
- YMCA Olomouc
- Yacht Club Kotva Praha, z.s.
- YMPAL- SPORT, o.s.
- YMCA Strmilov
- Youth and Students for Peace Czech Republic z.s.
- Yacht Racing Team z.s.
- Yacht club Labe z. s.
- Yggdrasil Yoga z. s.
- YMCA Nejdek
- YACHT club Jablonec n.Nisou
- Young Initiative z.s.
- YACHT CLUB ORLÍK, z.s.
- you connected, z.s.
- YMCA Neveklov "v likvidaci"
- Yacht club D.I.M. Bezdrev z.s.
- Yacht klub Junior Praha
- YACHT KLUB ORLÍK - BOR z.s.
- YPG Evropa, z.s. v likvidaci
- Yacht Club Lipno nad Vltavou, z.s.
- Y.C. Markop FL, z.s.
- Yacht club Santa Maria v likvidaci
- Yacht Club Nový Jičín z.s.
- Yacht Club Skochovice
- Yacht Club Slezan Opava, z.s.
- YachtClub Dyje z.s.
- Yellow Hills z. s.
- YWAM ČR z.s.
- YACHT CLUB BOHEMIA z. s.
- yo-yo, z. s.
- YACHTCLUB PASOHLÁVKY z. s.
- Yacht Club Říčany
- YMCA v České republice
- YACHT CLUB Dvořiště - Lišov, z.s.
- Yacht Club Poseidon Praha z. s.
- Youth Progress, z.s.
- YACHT CLUB MILEVSKO z.s.
- Yacht klub Jestřábí, z.s.
- YMCA DAP
- Youngtimer Cars Club, z.s.
- Yachtclub Balaton 24 z.s.
- YACHT CLUB PŘÍBRAM, z.s.