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- Wonderful World of Stamps (Isidore Baum - Canada)
- Woodford
Sports Covers (United Kingdom)
- World Forum Philatelist (WFP)
- World of Stamps (Five S Stamps - United States)
- World Topical PR China, Hong Kong, Macau, Taiwan (Xie Qiang - China)
- World Wide Fund Stamps (Konstantin Grinchenko - Ukraine)
- World Wide Stamps (Rick Simmons - United States)
- World Wildlife Fund
Stamps for Sale (Tung Jonathan - Hong Kong)
- World
Wildlife Fund (Carole Murry - United States)
- WorldStamps (United States)
- Worldwide Collections (C. de Ruiter - Netherlands)
- Worldwide Covers and Scandinavian
Booklets (Atlas Haftes AB - Sweden)
- Worldwide Postal History and Covers for Sale (Sören Andersson and Co - Sweden)
- Worldwide
Postal Stationery for Sale (Mike Sagar - Canada)
- Worldwide Revenue Stamps for Sale (William T. McDonald - United States)
- Worldwide Revenues and Cinderellas (Rigastamps - United States)
- Worldwide Stamp Collections for Sale (Colin Deane - Canada)
- Worldwide
Stamp Collection For Sale (T. Chabvonga - Zimbabwe)
- Worthington Stamps Canal Zone Stamps and Covers (Wayne L. Worthington - United States)
- Worthington Stamps (Wayne Worthington - United States)
- Wouters FilaSite (Wouter Geraedts - Netherlands)
- Wulff's Stamps Online USA, France, French Offices, French Colonies, Monaco (United States)
- http://www.collect.at/ China - Asia (Friedrich Zettl - Austria)
- YiuStamp (Hong Kong)
- Zum Postillon GmbH (Markus Seitz - Switzerland)
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