Decia may refer to :
*
Decia gens
The gens Decia was a plebeian family of high antiquity, which became illustrious in Ancient Rome, Roman history by the example of its members sacrificing themselves for the preservation of their country. The first of the family known to history wa ...
, an ancient Roman family
* the Ancient city and bishopric
Mopsuestia
* in Latin, feminine form of ''decius'' (the) 'tenth'
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