Rosston is a town in south-central Nevada County, Arkansas, United States.

According to the United States Census Bureau, the town has a total area of 11.6 km2 (4.5 mi2), of which 11.5 km2 (4.4 mi2) is land and 0.1 km2 (0.04 mi2) (0.45%) is water.

The racial makeup of the town was 41.89% White, 57.74% Black or African American, 0.38% from other races.

22.1% of all households were made up of individuals, and 12.6% had someone living alone who was 65 years of age or older.

About 20.7% of families and 26.2% of the population were below the poverty line, including 28.6% of those under the age of eighteen and 32.5% of those 65 or over.