Jaci may refer to the following places:
*
Acireale (Sicilian: ''Jaciriali'', locally shortened to Jaci), Sicily, Italy
*
Jaci (river), in Sicilily, Italy
*
Jaci, São Paulo, Brazil
* Jaci or
Jasy, Tupi Guarani moon deity
See also
*
Jasy Jatere, an important figure in Guaraní mythology
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