Harrold is a town in Hughes County, South Dakota, United States.

It is part of the Pierre, South Dakota Micropolitan Statistical Area.

[7] A post office was established as Harold in 1882, and the name was changed to Harrold in 1890.

[9] According to the United States Census Bureau, the town has a total area of 0.27 square miles (0.70 km2), all land.

There were 74 housing units at an average density of 274.1 per square mile (105.8/km2).

The racial makeup of the town was 98.56% White, 0.48% Native American, and 0.96% from two or more races.