Sardinia world (22 centenarians/100,000 inhabitants). Sardinia is the first discovered Blue Zone, a demographic and/or geographic area in the world with an oversize concentration of centenarians and supercentenarians. In 2016 there were 50,346 foreign national residents, forming 3% of the total Sardinian population. The most represented nationalities were: Sardinia's most populated cities are Cagliari and Sassari. The Metropolitan City of Cagliari has 431,302 inhabitants, or about ¼ of the population of the entire island. Eurostat has identified in Sardinia two Functional Urban Areas: Cagliari, with 477,000 inhabitants, and Sassari, with 222,000 inhabitants. Sardinia is one of the five Italian autonomous regions,
Sardinia, Ohio above the poverty line, including 24.2% of those under age 18 and 14.3% of those age 65 or over. The village is served by Eastern High School (Sardinia, Ohio). Sardinia has a public library, a branch of the Brown County Public Library. Sardinia, Ohio Sardinia is a village in Brown and Highland counties in the U.S. state of Ohio. The population was 980 at the 2010 census. The village's name is derived from the homonymous island in the Mediterranean Sea. Historically, Sardinia was a post village of Brown County, in Washington township, established in 1830, situated on the east fork