Family name Guastella (Guastella 
) , worldwide, is quite a common surname. The last name Guastella is characteristic of Italy, where it is quite a rare surname, Paraguay, and Argentina, where it is a rare surname. In absolute terms, it is commonest in Italy, the United States, and Argentina. Much less frequently, Guastella is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Guastella | Paraguay, Brazil, Italy, United States, Argentina |
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serafino amabile guastella Italian anthropologist, IT (b. 1819) |
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| cosmo guastella Italian philosopher (1854-1922), IT (b. 1854) |
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| ernesto guastella IT (b. 1855) |
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ángel guastella Argentine rugby union footballer and coach (1931-2016), AR (b. 1931) |
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| gianni guastella researcher (b. 1957) |
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| salvatore guastella Italian association football player, IT (b. 1963) |
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| joseph t. guastella U.S. Air Force deputy chief of staff for operations (b. 1965) |
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| adam j guastella researcher |
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| giuseppe guastella researcher |
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| virginie guastella researcher |
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| dario calogero guastella researcher |
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| virginia guastella IT (b. 1979) |
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