Sardinia is a village in Brown and Highland counties in the U.S. state of Ohio.

Historically, Sardinia was a post village of Brown County, in Washington township, established in 1830, situated on the east fork of White Oak Creek, 12 miles (19 km) north-east of Georgetown, and 44 miles (71 km) east of Cincinnati.

[6] According to the United States Census Bureau, the village has a total area of 1.24 square miles (3.21 km2), all land.

There were 416 housing units at an average density of 335.5 per square mile (129.5/km2).

24.0% of all households were made up of individuals, and 8.6% had someone living alone who was 65 years of age or older.

The racial makeup of the village was 98.61% White, 0.23% Black or African American, and 1.16% from two or more races.

26.8% of all households were made up of individuals, and 13.7% had someone living alone who was 65 years of age or older.