Ussassai () is a village and comune (municipality) in the Province of Ogliastra in the autonomous island region of Sardinia in Italy, located about northeast of Cagliari and about southwest of Tortolì. It has 432 inhabitants.

Ussassai borders the municipalities of Gairo, Osini, Seui, and Ulassai.

Demographics As of 2026, the population is 432, of which 51.6% are male, and 48.4% are female. Minors make up 7.2% of the population, and seniors make up 41.9%.

Immigration As of 2025, immigrants make up 4.8% of the total population. The 5 largest foreign countries of birth are Germany, Argentina, Romania, Belgium, and France.

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