Siddi is a village and comune (municipality) in the Province of Medio Campidano in the autonomous island region of Sardinia in Italy, located about northwest of Cagliari and about north of Sanluri in the historical sub-region of Marmilla. It has 541 inhabitants.
Siddi is home to several archaeological findings, including a domus de janas from the Ozieri culture, a Giants' tomb and several nuraghe villages.
Siddi borders the municipalities of Baressa, Collinas, Gonnoscodina, Gonnostramatza, Lunamatrona, Pauli Arbarei, and Ussaramanna.
Demographics As of 2026, the population is 541, of which 49.9% are male, and 50.1% are female. Minors make up 5.5% of the population, and seniors make up 41.2%.
Immigration As of 2025, immigrants make up 1.6% of the population. The 5 largest foreign countries of birth are France, Croatia, Cuba, Germany, and Romania.
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