Harrold is a town in Hughes County, South Dakota, United States. It is part of the Pierre, South Dakota Micropolitan Statistical Area. The population was 209 at the 2000 census.
Harrold is located at 44°31′20″N 99°44′20″W / 44.52222°N 99.73889°W / 44.52222; -99.73889 (44.522198, -99.738878).
According to the United States Census Bureau, the town has a total area of 0.3 square miles (0.7 km²), all of it land.