Wildstein may refer to:

• Skalná, a city in the Czech Republic known as "Wildstein" in German
• Bronisław Wildstein (born 1952), a former Polish dissident, a journalist, and a freelance author
  • Wildstein list, a list distributed by Bronisław Wildstein of people associated with the Polish intelligence services
• David Wildstein (born 1961), an American businessman, Republican Party politician, and political blogger

• Chiloean mythology
• Chiloeches
• Chiloeches, Guadalajara
• Chiloeches, Spain
• Chiloe Widgeon
• Chiloglanis
• Chiloglanis asymetricaudalis
• Chiloglanis bifurcus
• Chiloglanis deckenii
• Chiloglanis kalambo
• Chiloglanis lufirae
• Chiloglanis mbozi
• Chiloglanis rukwaensis
• Chiloglanis ruziziensis
• Chiloglanis sp. nov. 'Kerio'
• Chiloglanis sp. nov. 'Northern Ewaso Nyiro'
• Chiloglanis swierstrai
• Chiloglanis trilobatus
• Chiloglottis
• Chilomycterus schoepfii
• Chilomys
• Chilomys instans
• Chilonatalus
• Chilonatalus micropus
• Chilonis (daughter of Leotychidas)