Family name Casty (Casty 
) , across the world, is a rare cognomen. The family name Casty is habitual in Switzerland, where it is quite a rare surname, Ghana, where it is a rare surname, and Czechia. Measured by absolute frequency, this name is the most popular in Switzerland, Ghana, and the United States. Also, Casty is the forename as well as the last name.
| guido casty Swiss bobsledder, CH (b. 1901) |
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| gian casty Swiss artist (1914-1979), CH (b. 1914) |
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rémi casty French rugby league footballer, FR (b. 1985) |
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| gilles casty French politician, FR (b. 1962) |
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| werner casty CH (b. 1955) |
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| elfie casty Swiss writer, CH |
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