Christiansburg is a village in Champaign County, Ohio, United States.

However, this post office (ZIP code 45389) is a PO Box-only office; street delivery is not offered to residents who live in the village limits, and mail can only be delivered to a household's PO Box.

[7] According to the United States Census Bureau, the village has a total area of 0.22 square miles (0.57 km2), all of it land.

There were 230 housing units at an average density of 1,066.1 per square mile (411.6/km2).

23.6% of all households were made up of individuals, and 13.4% had someone living alone who was 65 years of age or older.

28.1% of all households were made up of individuals, and 13.4% had someone living alone who was 65 years of age or older.