Cognomen Decia (Decia 
) , in all the world, is a rare family name. The surname Decia is habitual in Uruguay, where it is quite a rare surname, Argentina, where it is a rare surname, and Italy. More prevalently, Decia is the forename as well as the last name.
| giovanni decia IT (b. 1852) |
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| maría carmen decia Uruguayan writer, UY (b. 1944) |
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| alfredo decia Uruguayan writer, UY (b. 1953) |
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| messia decia daughter of Roman emperor Decius and wife of Roman emperor Volusianus |
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| ida decia Uruguayan writer, UY |
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