Collinas () 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 northwest of Sanluri. It has 741 inhabitants.
Collinas borders the municipalities of Gonnostramatza, Lunamatrona, Mogoro, Sardara, Siddi, and Villanovaforru.
Demographics As of 2026, the population is 741, of which 48.9% are male, and 51.1% are female. Minors make up 8.9% of the population, and seniors make up 35.9%.
Immigration As of 2025, immigrants make up 2.6% of the total population. The 5 largest foreign countries of birth are France, Romania, Morocco, Germany, and Kyrgyzstan.
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