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- World Association of Bioresonance & Systemic Information Therapy, o.s.
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- WRC Prachatice
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- Wenchang Wang, z.s.
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- Windsurfing Nechranice z.s.
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- WCS Prague, z. s.
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- WAY TO YOUR HEART z.s. - zkrácený název spolku WTYH
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- WHITE SOX - BASEBALL
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- Western ranč Na Samotách
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- White Pearl Gallery, z.s.
- Worldwide Professional Logistics o.s.
- W 135
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- Water Lily Sport Club z. s.
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- Women in Tech, z. s.
- Winter Hockey Days z.s.
- Waldorfská iniciativa Liberec, z.s.
- WESTERN SPORT ŽLUTAVA z.s.
- Wakeboardingový sportovní klub Brno, z.s.
- Wikisofia, z. s.