Claire City is a town in Roberts County, South Dakota, United States.

[8] The first postmaster was Ben Sandsmark; the post office moved into the Herb Bladow building in 1968.

[9] According to the United States Census Bureau, the town has a total area of 0.18 square miles (0.47 km2), all land.

21.2% of all households were made up of individuals, and 6.1% had someone living alone who was 65 years of age or older.

24.3% of all households were made up of individuals, and 10.8% had someone living alone who was 65 years of age or older.

There were 8.0% of families and 4.9% of the population living below the poverty line, including 11.8% of under eighteens and none of those over 64.