Sulphur Rock is a town in Independence County, Arkansas, United States.

[4] According to the United States Census Bureau, the town has a total area of 1.3 square miles (3.3 km2), all land.

[3] The last regular mule-drawn tram line in the United States was in Sulphur Rock, closing down in 1926.

[citation needed] As of the census[6] of 2000, there were 421 people, 169 households, and 113 families residing in the town.

29.6% of all households were made up of individuals, and 21.3% had someone living alone who was 65 years of age or older.