Lower Salem is a village in Washington County, Ohio, United States.

[6] The town site was not laid out until 1850, and was settled predominantly by German immigrants.

[7] Lower Salem was once home to a hotel, a doctor's office, an armory, Wagner's General Store, and a gas station and auto parts shop.

[citation needed] According to the United States Census Bureau, the village has a total area of 0.06 square miles (0.16 km2), all land.

The racial makeup of the village was 93.58% White, 0.92% African American, and 5.50% from two or more races.

19.4% of all households were made up of individuals, and 8.3% had someone living alone who was 65 years of age or older.

There were 7.4% of families and 5.0% of the population living below the poverty line, including 3.7% of under eighteens and 10.5% of those over 64.