Olivet is a town in Hutchinson County, South Dakota, United States. The population was 74 at the 2010 census. It is the county seat of Hutchinson County.
Olivet is located at 43°14′30″N 97°40′30″W / 43.24167°N 97.675°W / 43.24167; -97.675 (43.241660, -97.675063).
According to the United States Census Bureau, the town has a total area of 0.2 square miles (0.4 km²), all of it land.