- Young MBSA
- yo-yo, z. s.
- Yacht Club Kovářov z.s.
- Yacht Club Solenice, z. s.
- YIMBY Praha, z.s.
- YAMAMOTO Czech z.s.
- YogafestZLÍN z.s.
- YACHT CLUB SALAŠ
- Yacht klub Junior Praha
- YACHT CLUB CERE, z.s.
- Yoga Ostrava, z.s.
- Yacht klub Mělník z.s.
- YMCA v České republice
- YACHT CLUB SILŮVKY, z.s.
- Ygdrassil, z.s.
- YACHTCLUB PETROV z.s., v likvidaci
- YOUnique z.s.
- Youth For Future, z.s.
- YMCA Letohrad
- Youth in Czech Republic, z.s.
- Yellow Sisters z. s.
- YMCA Orlová
- YOUTH ROMA PARLIAMENT, z. s. v likvidaci
- Young Golf Champions z.s.
- YMCA Braník
- YAHÚ Team Kostelec, z.s.
- YMPAL- SPORT, o.s.
- Yoki Home, z.s.
- Yukiyama dojo, z. s.
- YACHT CLUB BOHEMIA z. s.
- Yangame Gym
- Yacht Club Lipno nad Vltavou, z.s.
- YACHT CLUB DOKSY, spolek
- Yacht Club Řež z.s.
- Ynnovations - Institut pro znalostní společnost v likvidaci
- YACHT CLUB MILEŠOV z.s.
- Yacht Club Bohemia o.s.
- Yacht Club Lanškroun, z.s.
- YMCA SKAUT
- Yale Model Government Europe CZ, o. s.
- Yacht Club Slezan Opava, z.s.
- YMCA Děčín
- YC Píšťany - vodní sporty
- YACHT CLUB Chrášťany z.s.
- YACHT CLUB RAZOVÁ z. s.
- Yoga House, z.s.
- Yacht club Krnov z.s.
- YMCA Husinec
- Yetti Club Trutnov z. s.
- YC Frymburk z. s.