Oak Grove is a town in Carroll County, Arkansas, United States.

[4] According to the United States Census Bureau, the town has a total area of 2.5 square miles (6.6 km2), all land.

[5] As of the census[7] of 2000, there were 376 people, 145 households, and 108 families residing in the town.

The racial makeup of the town was 96.28% White, 1.60% Native American, 0.53% Asian, and 1.60% from two or more races.

24.1% of all households were made up of individuals, and 13.1% had someone living alone who was 65 years of age or older.