Sardinia is a village in Brown and Highland counties in the U.S. state of Ohio. The population was 1,083 at the 2020 census. Sardinia was laid out in 1833. The village's name is derived from a methodist hymnal popular during the 1840's. Historically, Sardinia was a post village of Brown County, in Washington township, established in 1830, situated on th…Sardinia is a village in Brown and Highland counties in the U.S. state of Ohio. The population was 1,083 at the 2020 census. Sardinia was laid out in 1833. The village's name is derived from a methodist hymnal popular during the 1840's. 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 north-east of Georgetown, and 44 miles east of Cincinnati. In 1860, Sardinia's population was 200 and Washington Township had a population of 1,300. It was a station on the Cincinnati & Eastern Railroad, today the Cincinnati Eastern Railroad.