Buncombe is a village in Johnson County, Illinois, United States.

There were 86 housing units at an average density of 71.1 per square mile (27.5/km2).

The racial makeup of the village was 99.46% White and 0.54% Native American.

28.0% of all households were made up of individuals, and 10.7% had someone living alone who was 65 years of age or older.

About 1.6% of families and 8.5% of the population were below the poverty line, including 8.7% of those under the age of eighteen and none of those 65 or over.