W
- Antoni Józef Wagner (1860–1928), from Poland/Austria
- Carroll Marshall Wagner (born 19??), from the USA
- Frances Eleanor Wagner (born 1916), from the USA
- Frances Joan Estelle Wagner (born 1927), from Canada
- Genevieve Wagner (died 1979), from USA, 1st spouse of
- Janós Wagner (1906–1948), from Hungary
- Johann Andreas Wagner (1797–1861), from Germany
- Johann Jacob Wagner (1641–1695), from Germany
- Robert Jacob Lewis Wagner (1905–1992), from the USA
- Rudolph Wagner (1805–1864), from Germany
- W. M. Wagner (1926–1991), from the Netherlands
- William Wagner (zoologist) (1796–1885), from the USA
- Bryant Walker (1856–1936), from USA (works) note: a few other malacologists/biologists are also named Walker
- Robert Boog Watson (1823–1910), from Scotland
- Reverend William Henry Webster (died 1931), from Wauiku, New Zealand (his articles)
- Wilhelm August Wenz (1886–1945), from Germany
- Carl Agardh Westerlund (1831–1908), from Sweden
- Wolfgang Karl Weyrauch (1907–1970), South American freshwater gastropods and land gastropods
- Gilbert Percy Whitley (1903–1975), born in Great Britain, lived in Australia
- Carl Arend Friedrich Wiegmann (1836–1901), from Germany
- Martha Burton Woodhead Williamson (1843-1922)
- Thomas Vernon Wollaston (1822–1878), from Great Britain
- Bernard Barham Woodward (1853–1930), from Great Britain
- Charles B. Wurtz (1916–1982), USA, portrait
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